Tuesday 23 February 2016

TCS OFFCAMPUS 2015

‪#‎tcs‬ 2nd december with solutions
1)Esha ran 224m in 27 sec and Usha in 17 sec.AT what distance did Esha
cross Usha.?
Ans:formula is : x(t2-t1) /t2
224(27-17) /27
2)a series 1234123441234441234444.....n what is the value on 200th position..?
Ans:1234 => 4 times
12344 => 5 times
123444 => 6 times
.
.
.
4 + 5 + 6 + ...n < 200
n(n+1)/2 - 6 = 200
So n = 19
i.e. 4+5+6+...19 = 184
After the 184th term,the sequence has 20 terms
12344444444444444444 = 20 terms
=> 200th term = 4
3)Star mark question(most tricky) How many squares are there between
2011 to 2300 which follows 2013,2020,2027.......2300
Ans; there are 3 squares 45.,46,47 but 47^2 follows the pattern.
answer 1 many given 3 (note:-but it is completely wrong
)
4)If a pipe can fill the tank within 6hrs.But due to leak it takes 30
min more. Now
the tank is full then how much time will it take to empty the tank through the
leak?
Ans;
given that it takes 6 hours for the pipe to fill the tank
so in 1 hour it can fill =1/6
but because of leak it takes 30 min more i.e (6+1/2) hours =13/2.
so in 1 hour pipe+ leak can fill= 2/13
finally pipe=1/6
pipe+leak=2/13
leak=1/6-2/13 =1/78
leak can alone do in 78 hours.
5)
There was a question of train. 2 trains crossing each other in 23
seconds. A man standing on the platform.. Find the ratio of speeds of
2 trains.i cannot completely recall that question
Ans:Let the speeds of the two trains be x m/sec and y m/sec respectively.
Then, length of the first train = 27x metres,
and length of the second train = 17y metres.
27x + 17y / x+ y = 23
27x + 17y = 23x + 23y
4x = 6y
x/y = 3/2
(the question is from rs agaarwal)
6)the numbers from 1 to 20 are written in the below order, sum of any
two adjacent numbers is prime number.
20;A;16;15;4;B;12:C;10;7;6;D;2;17;14;9;8;5;18;E
then find value at A ?
Ans:
A=3
B=19
C=1
D=11
E=13
7)if a(b+c)=33
b(c+a)=40
c(a+b)=49
then find ab
Ans:a(b+c)=33
so a=11 or 3
b+c=11 or 3
c(a+b)=49
c=7
a+b=7
so a=3
and b=4
and c=7
abc=84
8)#(most dangerous ) a spider web consists of 3 concurrent lines
forming radial support for 20 concentric regular hexagon .the hexagon
vertices are 5mm from their immidiate neighbour. if the innermost
hexagon has a side length 3mm how many meters is the length of the
entire web including the 3 diagonals ?
Ans;side of innermost hexagon = 3mm
side of next hexagon = 8mm
it goes on as series 3,8,13... 20th terms
total length of smallest hexagon = 6 * 3= 18mm
next hexagon length = 6 * 8= 48mm
sum of all hexagon sides = 20/2 * (2*18 + 19 * 30) = 6060mm
but the sum length of diagonals is 6*98=588
so 6.060+0.588=6.648 meters
9)the diagnal of a square field is 266.66(some value i dont remember
exactly), then find the area of a square
ANs:ans- a. 2*10^4
10)Rs.7791 is divided among shills=a ,beena and chris in such a way
that if Rs.34 Rs.32 and Rs.29 be deduced from their respective shares
they are left with money in the ratio 8:6:12 find shilas share in
rupees a)2402 b)1798 c)1808 d)239
Ans:7791-(34+32+29)=7696
s:b:c=8:6:12
share of s=8/26*76976 + 34=2402
11)123412344123444123444412344444... now the last two terms of 200th number
Ans:1st group 1234 number of digit 4
2nd group 12344 number of digit 5
3rd group 1234444 number of digit 6
so at the end of each group there will be series of 4s.
So the answer is 44
12)HOW MANY NUMBERS ARE THERE FROM 1 TO 400 HAVING EXACTLY THREE
INTEGRAL FACTORS
ANs:there are total 8 nos. less than 400 having three integral factors
4 , 9 , 25 , 49 , 121 , 169 , 289 , 361
13)(1-1/3^2) (1-1/4^2) (1-1/5^4)----------(1-1/2015^2) = x/2015 then x value
Ans:(1+1/3)(1-1/3)(1+1/4)(1-1/4)......(1-1/2015)(1+1/2015)=x/2015
2/3*4/3*3/4*5/4.......................2014/2015*2016/2015=x/2015
2/3*2016/2015=x/2015
after solving
x=1344.
14)x,y,z are positive integers if x(y+z)=63, y(z+x)=40, z(y+x)=33.
what is the value of x+y+z ( please check ,not sure)
ans: answer is 14 but not sure please check as this is not in my slot as x=7
y=4
z=3
15) Given sequence 91011....33 .what is the remainder when divided by 9?
a)2
b)0
c)3
d)7
ans:c)3
(9+10+11+12.......33)-(1+2+3...8)
so here
n(n+1)/2-n(n+1)/2
(33x34)/2-(8x9)/2
33x17-4x9
561-36=525
now 525/9=3
16)when sum of the numbers from 9 to 33 divided by 9 the remainder is
a)7
b)5
c)3
d)1
ans:sum from 1 to 33 =561 i.e. (n(n+1)/2)
sum from 1 to 8= 36
561-36= 525
525/9 remainder is 3.....option C
17)x,y,z are positive integers if x(y+z)=63, y(z+x)=40, z(y+x)=33.
what is the value of x+y+z?
ans: do not have time,please solve
answer is 24 not sure .not in my slot
18)
In a tank 7/13 th part contains fuel. 22 liters of fuel is taken out
from the tank, Themn its showing 1/5th mark in tank.
ans:Let X ltr is total capacity,
then
(7/13)x-(1/5)x=22
(35x-13x)/65=22
x=65
19)A 4*4 Table was given first row contains number 1,2,3,4.We have to
find value of x which is in third row such that no number should
repeated diagonally or row-wise/column-wise.
ans:ans is =3(status: very tricky,do not attempt)
1 2 3 4
3 4 1 2
1 2 3 4
3 4 1 2
20)there are 2 man one old and one young work in the same office and
live in same apartment.
The old man takes 30 minutes to reach office and young man take 20
minutes to reach the office . If old man starts at 10:00 a.m for
office and the young man at 10:05 a.m then at what time will they
meet?
ans:et speed of old man=vo
let speed of young man=vy
vo*30=vy*20
vo/vy = 2/3.....................(1)
now let they will meet after t time of 10:00 am
vo*t = vy*(t+5).........................(2)
from eq(1) and eq(2) we get
vo*t = 15*vo
so, t=15 mints
now we can say that they will meet at 10:15 am
21)
in what ratio 50 rs and 60 rs wheat is to be mixed such that after
selling it at 70 rs a profit of 20% is made
ans:ans-1:5
let 50rs be x and 60rs be y
so,cost price=50x+60y
selling price=70(x+y)
gain%=sp-cp/cp*100
20/100=70(x+y)-(50x+60y)/50x+60y
x:y=1:5
22)a number decreases successively. for eg. 9876543210. How many such
5- digits numbers are possibe?
ans:ans 13/18
probability of not getting same no
1st person:6/6
2nd person:5/6
3 : 4/6
4: 3/6
probability of not getting similar is 6/6*5/6*4/6*3/6=5/18
probabilty of getting is:1-5/18=13/18 (ans)
23)do not remember the question but i remember f(1)=5 and f(a+b)=
F(a)+f(b)+ a*b someting like that
it is last option that i remember
24)
A series of book was published at seven year intervals. When the
seventh book was published the total sum of publication year was 13,
524. First book was published in?
a. 1911
b. 1910
c. 2002
d. 1932
Answer:
Explanation:
Let the years be n, n+7, n+14, ...., n+42. (∵ use formula Tn=a+(n−1)d
to find nth term)
Sum = Sn=n2(2a+(n−1)d) = 72(2n+(7−1)7) = 13,524
⇒7n+147=13,524
⇒ n = 1911
25)
Assume that f(1)=0 and f(m+n)=f(m)+f(n)+4(9mn-1). For all natural
numbers (Integers>0)m and n. What is the value of f(17)?
a. 5436
b. 4831
c. 5508
d. 4832
Explanation:
f(1) = 0
f(2) = f(1+1) = f(1)+f(1)+4(9×1×1 – 1) = 0+0+4×8 = 32
f(4) = f(2+2) = f(2)+f(2)+4(9×2×2 – 1) = 32+32+4×35 = 204
f(8) = f(4+4) = f(4)+f(4)+4(9×4×4 – 1) = 204+204+4×143 = 980
f(16) = f(8+8) = f(8)+f(8)+4(9×8×8 – 1) = 980+980+4×575 = 4260
f(17) = f(1+16) = f(16)+f(1)+4(9×16×1 –1) = 4260+0+ 4×143 = 4832
26)Ram and Shakil run a race of 2000 meters. First, Ram gives Shakil a
start of 200 meters and beats him by one minute. If, Ram gives Shakil
a start of 6 minutes Ram is beaten by 1000 meters. Find the time in
minutes in which Ram and Shakil can run the races separately.
a. 12, 18
b. 10, 12
c. 11, 18
d. 8, 10
Answer: d (folow campusgate for story )
27)
Of a set of 30 numbers, average of first 10 numbers = average of last
20 numbers. Then the sum of the last 20 numbers is?
a. Cannot be determined.
b. 2 x sum of last ten numbers
c. 2 x sum of first ten numbers
d. sum of first ten numbers
Answer: c
Explanation:
We know that sum = average x number of observations.
Let the common average = x
Now sum of first 10 numbers = 10x
Sum of the last 20 numbers = 20x.
So sum of the last 20 numbers = 2 × sum of the first ten numbers.
Question updated today :
28)According to the stock policy of a company , each employee in the
technical division is given 15 shares of the company and each employee
in the recruitment division is given 10 shares. Employees belonging to
both Communities get 25 shares each. There are 20 employees in the
company and each one belong to at least one division. The cost of each
share is $10. If the technical division 15 employees and the
recruitment division has 10 employees, then what is the total cost of
the shares given by the company?
a. 3120
b. 3250
c. 2650
d. 3180
Ans:total emp-20
10-recruitmnt
15-tech
so 5 - both
so only recruimnt -5
only tech -10
(5*25*10)+(5*10*10)+(10*15*10)
=1250+500+1500=3250
29)there is a networking questions,if one goes to A it is rs 100 and
one goes to B it is rs 200,follow dijakstra algorithm to get the
answer. the answer is rs 800
Email writing with phrases I remember :
Write an email in 50 words to a organization called 'helping hand' to
request them to help an old man who is an orphan not able to
speak...suffering from diseases and requesting him to accomodate .Sign
as Anthony. there are many ,i Remembered few of them.
Homeless-bus stand- reticent - rags - bus stand - help - care-
obliged-no shelter- food-accomodation-destitute home.

Saturday 6 February 2016

SOFTWARE TESTING

The IEEE definition of test case is “Documentation specifying inputs, predicted results, and a set of execution conditions for a test item.” The aim is to divide the software function into small units of function that is testable with input, and producing result that is measurable.
Designing good test cases is a complex art. The complexity comes from three sources: 

Test case is a set of conditions/steps under which a tester will decide whether an application, software system or one of its features is working correctly or not.
  • Test cases help us discover information. Different types of tests are more effective for different classes of information.
  • Test cases can be “good” in a variety of ways. No test case will be good in all of them.
  • People tend to create test cases according to certain testing styles, such as domain testing or risk-based testing. Good domain tests are different from good risk-based tests.
Document Collection for Test Case Writing:

1) User Requirements Document
A document which list the business process, user profiles, user environment, interaction with other systems, replacement of existing systems, functional requirements, nonfunctional requirements, licensing and installation requirements, performance requirements, security requirements, usability and concurrent requirements etc.,
2) Business Use Case Document
A document which details the use case scenario of the functional requirements from the business perspective. This document covers the business actors (or system), goals, pre-conditions, post-conditions, basic flow, alternate flow, options, exceptions of each and every business flow of the system under requirements.
3) Functional Requirements Document
A document which details the functional requirements of each feature for the system under requirements. Normally, functional requirements document serves as a common repository for both development and testing team as well as to the project stakeholders including the customers for the committed (sometimes frozen) requirements, which should be treated as a most important document for any software development.
4) Software Project Plan (Optional)
A document which describes the details of the project, objectives, priorities, milestones, activities, organization structure, strategy, progress monitoring, risk analysis, assumptions, dependencies, constraints, training requirements, client responsibilities, project schedule etc.,

5) QA / Test Plan
A document which details the quality management system, documentation standards, change control mechanism, critical modules and functionalities, configuration management system, testing plans, defect tracking, acceptance criteria, The test plan document is used to identify the features to be tested, features not to be tested, testing team allocations and their interface, resource requirements, testing schedule, test case writing, test coverage, test deliverables, pre-requisite for test execution, bug reporting and tracking mechanism, test metrics etc.,

DELL SONIC WALL


QUINNOX SAMPLE PAPERS

SECTION – I     (QUANT)

1.   A jogger running at 9 kmph alongside a railway track in 240 meters ahead of the engine of a 120 meters long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?
     
            (a)  3.6 sec (b) 18 sec --(c) 36 sec   (d) 72 sec



2.   If 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:
     
           --- (a)  4 days         (b) 6 days (c) 5 days (d) 7 days  


3.   A trader mixes 26 kg of rice at Rs. 20 per kg with 30 kg of rice of other variety at Rs. 36 per kg and sells the mixture at Rs. 30 per kg. His profit percent is:
     
            (a) No profit, no loss   -- (b) 5%     (c) 8%   (d) 10%    


4.   A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old is the mother at present?
           
           -- (a) 32 years       (b) 36 years          (c) 40 years   (d) 48 years


5.   A pupil's marks were wrongly entered as 83 instead of 63. Due to that, the average marks for the class got increased by half. The number of pupils in the class is:

            (a) 10         (b) 20 ---(c) 40   (d)  73


6.   In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
           
             (a) 159     (b) 194 (c) 205 -(d) 209  


7.   Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:

(a) 75         (b) 81 -(c) 85   (d)  89


8.   A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3: 5?
           
            (a) 4 litres, 8 litres          - (b) 6 litres, 6 litres           (c) 5 litres, 7 litres          (d) 7 litres, 5 litres                  


9.   Sakshi invests a part of Rs. 12,000 in 12% stocks at Rs. 120 and the remainder in 15% stock at Rs. 125. If his total dividend per annum is Rs. 1360, how much does he invest in 12% stock at Rs. 120?

           - (a) Rs. 4000          (b) Rs. 4500   (c) Rs. 5500 (d) Rs. 6000


10. How much does a watch lose per day, if its hands coincide every 64 minutes?

             -(a) 32  8/11  min   (b) 36  5/11 min   (c) 90 min   (d) 96 min  


11. If 6th March 2005 is Monday, what was the day of the week on 6th March, 2004?

           -(a)  Sunday               (b) Saturday       (c) Tuesday (d)Wednesday  


12. Choose the figure which best fits the question mark.



          (a)   1                  (b) 2                -(c) 3             (d) 4            


13. Which number replaces the question mark?



         (a) 6                  (b) 10            -(c) 8           (d) 9            



14. I participated in a race. 1/5th of those before me are equal to 5/6th of those behind me. What are the minimum number of contestants in the race?

            (a) 31                (b ) 62   (c) 24   -(d)  32    


15.  In an examination Mr. X got a third of the answers wrong. In the same examination Mr. Y got 5 of them wrong. Between both of them they answered three quarters of the questions right. How many questions did Mr. X answer correctly?

           (a) 30                 (b) 10 (c) 20 (d)  25                

                                             
                                             






Section – II  (LOGIC)


16. The question consists of six statements followed by options consisting of three statements put together in a specific order.  Choose the option which indicates a valid argument that is when the third statement is a conclusion drawn from the preceding two statements
   
     A. Some parrots are owls.
     B. All Birds are Dolls.
     C. No Doll is Monkey.
     D. All Owls are Monkeys.
     E. Some Dolls are Birds.
     F. Some Monkeys are Parrots.

(a) AFB (b) BCD (c)  BEF -(d) DAF          


17.    In a certain language “I AM FINE” is coded as “123” and “HE IS FINE” is coded as “345” and “I AM THANKFUL” is coded as “127” then how is “FINE IS THANKFUL”coded as:

(a) 732 (b) 123 -(c) 347         (d) Indeterminate


18.     The question has a main statement followed by the statement labeled A, B, C, D.
          Choose the ordered pair of statements where the first statement implies the two and the two are logically consistent with the main statement.

            When the going gets tough, the tough get going.

A.   The tough are not going. B.  The going is not all that tough.
C.   We are going through difficult times. D.It is time for us to get tough.

---(a)  AB (b) BA (c) CD (d) DC  


Find the missing number in the following series:

19.         5, 11,  23,  47,  95 ,  __

          - (a) 191   (b) 161   (c) 181   (d) 196              


20.        6, 25, 62, 123 ___

(a) 314 (b) 196   (c) 148   -(d) 214



 Refer to the data given below and answer the questions 21, 22 and 23 given below:

There are seven people P, Q, R, S, T, U and V occupying six floors of a building.  The following are the conditions applied.

I. P is on a floor immediately below Q and above T
II. U who is on the fifth floor has three floors in between himself and R
III. V shares a floor and is one floor above P.

21.    Who occupies the sixth floor?
-(a) S   (b)  R   (c) Q   (d) T  

22.     V shares his floor with _____
           (a) P   (b)  T   (c) R   -(d) U  

23.     R is on which floor?
(a) 2   (b) 3   -(c) 1   (d) 6

24.   If x is less than zero, y lies between 0 & 1, and z is greater than 1, which of the following
        is false?

(a) (x2 – z2) has to be positive   (b)  yz can be less than one  
(c)         xy can never be zero   (d)  (y2 – z2) is always negative.
 
Answer the questions 25 and 26 on the basis of the information given below:

            Five good friends meet everyday at Samrat Restaurant for a breakfast comprising of idli-vada.   Each consumes a different number of idlis and vadas.  The number of idlis consumed are 1,4,5,6 and 8 while the number of vadas consumed are 0,1,2,4 and 6.  Below are some of more facts about who eats what and how much.

(i) The number of vadas eaten by Itesh is three times the number of vadas consumed by the
             person who eats four idlis.
(ii) Three persons, including the one who eats four vadas, eat without sauce.
(iii) Sandesh does not take any sauce.
(iv) The one who eats one idli a day does not eat any vadas or sauce.  Further, he is not
            Mahesh.
(v) Devendar eats idli with sauce and also eats vada.
(vi) Mahesh, who does not take sauce, eats half as many vadas as the person who eats twice
            as many idlis as he does.
(vii) Bheemesh eats two more idlis than Itesh, but Itesh eats two more vadas than Bheemesh.

25.   Which one of the following statements is true?

   (a) Devendar eats 5 idlis     (b) Itesh eats 8 idlis  
   (c) Bheemesh eats 1 idli.     (d) Bheemesh eats 6 idlis.  

 26. Which of the following statements is true?
(a) Mukesh eats 8 idlis and 4 vadas but no sauce.
(b) The person who eats 5 idlis and 1 vada does not take sauce.
(c) The person who eats equal number of vadas and idlis also takes sauce.
(d) The person who eats 4 idlis and 2 vadas also takes sauce.

27.   If n = 1 + x, where x is the product of four consecutive positive integers, then which of
        the following is / are true?

A.     n is odd                          B.      n is prime                  C.    n is a perfect square

           - (a) A& C only     (b) A & B only   (c) A only     (d) None of these.


Answer questions 28 and 29 based on the following information.

            Seven University cricket players are to be honoured at a special luncheon.  The players will be seated on the dais along one side of single rectangular table.

(i) A & G have to leave the luncheon early and must be seated at the extreme right end of the table,
            which is closest to the exit.
(ii) B will receive the Man of the Match award and must be in the centre chair.
(iii) C and D who are bitter rivals for the position of wicketkeeper, dislike one another and should be
            seated as far apart as possible.
(iv) E & F are best friends and want to sit together.

28.   Which of the following may not be seated at either end of the table.
            -(a) C   (b) D   (c) G (d) F


 29.   Which of the following pairs may not be seated together?
(a) C & F   (b) B & D   -(c) E & A (d) G & D      

     
 30.  What will be the daughter of the woman who is the mother of the husband of my mother be
         to me?

(a) grand-daughter   (b) mother -(c) aunt   (d) daughter  

















SECTION – III  (TECHNICAL):


31.  Subtraction of 10010112 from 1110012 gives

       (a) 001110     (b)  001100     (c) 110011   (d) 001101


32.   One BAUD is defined as:

         (a) 1 byte/sec   (b) 1 gigabyte/sec    -  (c)  1 bit / sec (d) None of these
 
   
33. The language used for Network Programming is:
       
        (a) C++ (b) Java       (c) C (d) Pascal


34   In Binary coded decimal format, each decimal digit is encoded by:
     
(a) 3 bits (b) 4 bits (c) 6 bits -(d) 8 bits


35. Hexadecimal equivalent of 725.63 to base 8 is:
     
(a) A13.B6 (b) 1D5.CC (c) 3DA.BB -(d) None of these


36. A server in LAN is

         -(a) Device offering service to users (b) Supervisor
         (c) Main Workstation (d) None of these                                                                      


37  NAND, NOR and XOR are:
     
          (a) Primary Gates                                               (b) Secondary Gates
          (c) Invert Gates           (d) None of these.


38  Which of the following is true:

      -  (a) A.A’= 1 (b)A+A’= A           (c)A’+B’=(AB)’ (d)A’A’=A.


39.  A source program is:

      --  (a) Written in high-level language (b) Written in low-level language
        (c) Written in assembly language (d) None of the above.

40   A device to connect two types of networks  is known as:

(a) Router --(b)Bridge                (c) Gateway (d) None of these



41  One Tera byte = 1,024 ?

(a) --Gigabytes (b) Megabyte                     (c) Kilobyte   (d) None of these


42.  The decimal equivalent of the Binary number 1101.1 is:

(a) 12.5   (b) 31.5   (c) 15.3       (d) 13.5

43  Decimal equivalent of 614.15 to base 7 is:

(a) 305.24486         (b) 315.24486     (c) 305.28846     (d) 315.28846

44   16’s complement of (A8C)16 is

      (a)547     ( b) 647     (c) 574   (d) 578


 45.  In a circuit with resistance 10 kilo-ohms, if the applied voltage is 20 mV, then the current is

      (a)2 micro-amps                (b) 2 amps                             --(c) 2 milli-amps         (d) none of these










Contd…..




















SECTION – IV  (VERBAL)

        Select the choice that comes closest in meaning to the word given in the question

46.  Vociferous
       (a) embody   (b) silent   -(c) noisy   (d) feral

47.  Ambiguous
       (a) Certain                 (b) clear   (c) definite --(d) questionable  

  Directions for Questions 48 & 49.   Choose the word / pair of words which best expresses the relationship similar to  that expressed in the capitalized pair:

48.      DESTITUTION : MONEY:: ?
           (a) budget:options      (b) sobriety:inebriation (c)  opulence:wealth --(d) deficit:finance
49.     FOOD : GOURMET :: ?
          (a) book : critic      (b) art : Connoisseur                 --- (c) Sports : Fan     (d) Craft : Skill
50     FORGERY : FABRICATION  ::  Counterfeit:_______
         (a) Smuggling     (b) Deceit                    (c) Falsity ----(d) Designed

51.   A number of sentences are given below which, when properly sequenced, form a coherent paragraph.  Each sentence is labeled with a letter.  Choose the most logical order of the sentences from among the four given choices to construct a coherent paragraph:

A.  All levels of demand,  whether individual, aggregate, local, national, or international are subject to
      change.
B.  At the same time science and technology add new dimensions to products, their uses and the
      methods used to market them.
C.  Aggregate demand fluctuates with changes in the level of business activity, GNP, and national
       income.
D.  The demand of individuals tend to vary with changing need and rising income.

(a) CBDA   --(b) DCAB   (c) BCAD     (d) ADCB

Complete the following sentences with the most appropriate option in questions 52 to 54.

52.  Paradoxically, the more   the details this artist chooses, the better able she is to depict her fantastic, other worldly landscapes.
(a)  ethereal   --(b)  realistic   (c) fanciful   (d) extravagant  



53.  Normally an individual thunderstorm lasts about 45 minutes, but under certain conditions, the storm may
  , becoming ever more severe, for as long as four hours.

(a)  Wane                   --(b) moderate               (c) persist                    (d) vacillate              

       
 54.   Though one eye is kept firmly on the _________ , the company now also promotes __________
                   contemporary art.
(a) Present, experimental   (b) future, popular   (c) present, popular   --(d) market, popular.

           Read the passage below and answer the questions 55 to 60 that follow:
           Until recently most astronomers believed that the space between the galaxies in our universe was a near-perfect vacuum. This orthodox view of the universe is now being challenged by astronomers who believe that a heavy “rain” of gas is falling into many galaxies from the supposedly empty space around them. The gas apparently condenses into a collection of small stars, each a little larger than the planet Jupiter. These stars vastly outnumber the other stars in a given galaxy. The amount of “intergalactic rainfall” into some of these galaxies has been enough to double their mass in the time since they formed. Scientists have begun to suspect that this intergalactic gas is probably a mixture of gases left over from the “big bang” when the galaxies were formed and gas was forced out of galaxies by supernova explosions.
            It is well known that when gas is cooled at a constant pressure its volume decreases. Thus, the physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy. Meanwhile its place is taken by hotter intergalactic gas from farther out on the edge of the galaxy, which cools as it is compressed and flows into the galaxy. The net result is a continuous flow of gas, starting as hot gases in intergalactic space and ending as a drizzle of cool gas called a “cooling flow,” falling into the central galaxy.
           A fairly heretical idea in the 1970’s, the cooling-flow theory gained support when Fabian observed a cluster of galaxies in  the constellation Perseus and found the central galaxy, NGC 1275, to be a strange-looking object with irregular, thin strands of gas radiating from it. According to previous speculation, these strands were gases that had been blown out by an explosion in the galaxy. Fabian, however, disagreed. Because the strands of gas radiating from NGC 1275 are visible in optical photographs, Fabian suggested that such strands consisted not of gas blown out of the galaxy but of cooling flows of gas streaming inward. He noted that the wavelengths of the radiation emitted by a gas would changes as the gas cooled, so that as the gas flowed into the galaxy and became cooler, it would emit not x- rays,  but visible  light,  like that  which was captured in  the  photographs.  Fabian’s  hypothesis was  supported  by Canizares’ determination in 1982 that most of the gas in the Perseus cluster was at a  temperature of 80 million degrees Kelvin, whereas the gas immediately surrounding NGC 1275 (the subject of the  photographs) was at one- tenth this temperature.


55.    The primary purpose of the passage is to

(A) illustrate a hypothesis about the origin of galaxies
--(B) provide evidence to dispute an accepted theory about the evolution of galaxies
(C) summarize the state of and prospects for reseah in intergalactic astronomy
(D) report new data on the origins of intergalactic gas


56.   The author uses the phrase “orthodox view of the universe” (line 3) to refer to the belief that

--(A) the space between the galaxies is devoid of matter
(B) the space between galaxies is occupied by stars that cannot be detected by optical photographs
(C) galaxies have decreased in mass by half since their formation
(D) galaxies contain stars, each the size of Jupiter, which form clusters








57.   It can be inferred from the passage that, if Fabian is correct, gas in the peripheral regions of a galaxy cluster

(A) streams outward into intergalactic space
-- (B) is hotter than gas in the central regions of the galaxy
(C) is composed primarily of gas left over from the big bang
(D) results in the creation of unusually large stars


58.   The author of the passage probably mentions Canizares’ determination in order to

(A) clarify an ambiguity in Fabian’s research findings
(B) illustrate a generalization about the temperature of gas in a galaxy cluster
(C) introduce a new argument in support of the orthodox view of galaxies
--(D) provide support for Fabian’s assertions about the Perseus galaxies

59.   According to the passage, Fabian believes that gas flowing into a central galaxy has which of the following characteristics?

(A) It is one-tenth hotter than it was in the outer regions of the galaxy cluster.
--(B) It emits radiation with wavelengths that change as the gas moves toward the center of the galaxy. (C) The total amount of radiation emitted diminishes as the gas cools.
(D) It loses 90 percent of its energy as it moves to the center of the galaxy.



60.   According to the passage, Fabian’s theory makes use of which of the following principles?

(A) Gas emanating from an explosion will be hotter the more distant it is from the origin.
(B) The wavelength of radiation emitted by a gas as it cools remains constant.
--(C) If pressure remains constant, the volume of a gas will decrease as it is cooled.
(D) The volume of a gas will increase as the pressure increases.


IGATE SAMPLE PAPERS

ackground: white; line-height: 14.5pt; margin-bottom: 4.5pt; margin-left: 0in; margin-right: 0in; margin-top: 4.5pt;"> Questions From English- 20, Verbal reasoning: Reasoning- 15, Quantitative- 15
These are the questions that I remember.
1. GAMUT Synonym.
2. After the waves come, they will___cede (prefix).
3. Paragraph on job searching technique - 4Q (keywords :HONG KONG, central idea of 
passage, honesty, job seekers).
4. Articles - 2Q.
5. Preposition - 2Q.
6. Work____ (suffix) (answer is ship).
7. Arranging the sentences one after other correctly - 2Q.
8. Transitory antonym.
9. Totally antonyms - 2Q.
10. A factory produces 1 defective bulb out of 10 bulbs a year. If it produces 870 bulbs a year how many defective are produced.
11. If 15 men digs 35 cu units for 7 hours. How many men can dig 65 cu units in 5 hours?
Options:
A.49
B.19
C.29
D.39
12. Question on ages, simplification, Probability (neither black nor white selection).
13. A circle with radius 6cm and other circle with radius 8cm and their centres are separated by 10cm then what is the chord length? (From m4maths same question came so answered within 10 seconds).
14. Questions on blood relations - 3Q (one answer was brother).
15. Questions on Coding (2Q), syllogism (2Q), analogy (1Q), easy problem on speed & distance (1Q), profit and loss (1Q), R & P (1Q), % (1Q), difference in address (1Q).
16. One question on: Weights of a person for 1st, 2nd &3rd weeks, will be given in mixed fraction and the answer is no option is correct.
17. One question on logic deduction: If "king was brave is coded as "gamut atump slara and "soldiers are brave is coded as "kiter fhag slara then "brave is code as_____(answer is slara)
Dn 2 reasoning que. Was dr..
One was mirror image of sm arrow whose ans.was "c" n d ans.of 2nd image was "a"..simple blood relation que.whose ans was grandchild,dn ___cerd..u wer suppose 2 fill the black..age problm whose ans was "b" n below 2 dat 2 more que.with same ans.as " b"
Sorry guyzz...aache se yaad nhi h..
Questions From English - 20, Verbal reasoning: Reasoning -15, Quantitative -15
These r the questions that I remember.
1. GAMUT Synonym
2. After the waves come, they will ___cede.(prefix)
3. Paragraph on job searching technique.- 4Q(keywords :HONG KONG, central idea of passage, honesty, job seekers)
4. Articles -2Q
5. Preposition – 2Q
6. Work____ (suffix) (answer is ship).
7. Arranging the sentences one after other correctly.-2Q
8. Transitory antonym
9. Totally antonyms -2Q
10. A factory produces 1 defective bulb out of 10 bulbs a year. If it produces 870 bulbs a year how many defective are produced.
11. If 15 men digs 35 cu units for 7 hours. How many men can dig 65 cu units in 5 hours?
Options A.49
B.19
C.29
D.39 
12. Question on ages, simplification, Probability (neither black nor white selection).
13. A circle with radius 6cm and other circle with radius 8cm and their centres are separated by 10cm then what is the chord length? (From m4maths same question came so answered within 10 seconds).
14. Questions on blood relations -3Q (one answer was brother)
15. Questions on Coding(2Q), syllogism ( 2Q),analogy(1Q), easy problem on speed & distance(1Q),profit and loss(1Q),R & P(1Q),%(1Q),difference in address(1Q).
16. One question on: Weights of a person for 1st, 2nd &3rd weeks , will be given in mixed fraction and the answer is no option is correct .
17.One question on logic deduction: If “king was brave” is coded as “gamut atump slara” and “soldiers are brave” is coded as “kiter fhag slara” then “brave” is code as_____(answer is slara)(similar type of question)
17. MIRROR IMAGE (SAME QUESTION AS IT IS) (THE IMAGE IS GIVEN BELOW) Verbal & Logical section:
1) Gamut - Extent (Synonym)
2) Apoplectic - Frozen (Antonym)
3) Transitory - Transient
4) Statement "You don't go to hospital", answer is "You forgot lab reports"
5) Mason:wall :: Author:book
6) Fill in the blanks "Police got info about theft", answer is the option which contains "through,....,in"
7) Pick the incorrect sentence among the given four, answer is "power and ........ is the ..things in the universe"(sorry I don't remember the option exactly)
8) A question asking the mirror image of the given image, his option is "C", please flip the question paper and peep through for mirror image.
9) A question asking the overlap image of two images, his option is "A". You can answer it easily.
10) Encoded statement "King is brave" and "the brave soldier or so". Answer is "festa"
Aptitute section:
11) Men digging pit question, answer is 19.
12) Aeroplane flying with 240kmph question, answer is 300
13) Some question on current ages of someone, answer is 14,30
14) Color balls probability, answer is 5/17.
15) Length of the Chord question, answer is 9.6cm
Two questions on synonyms
1 transitory - transient
2 gamut - extent.
One question from antnoynm - whose ans is frozen
Question from tense ans is - ' had bought'
Question for statement , if u forgot ur document than u don't go to hospital
Ans is 'd' none of the above
IGATE SAMPLE PAPERS
Question from analogy mason : wall
Ans : author : book
Question from verb ans is - ' sell'
Five questions on passage ( if passage on job seekers )
ans - 1 -a
2) don't remember
3) C
4) b
5) a
2) Verbal
#‎Question on coding decoding - ans is - b
#Question if x is coded as xxxxx,y is coded as xxxxx ,w is coded as xxxxx,z is coded as xxxxx then how yyyyy is coded as
Ans is 'z'
#Question "the king is brave " is coded as "ge festa axoba" , animal is brave coded as dosta me festa then how brave is coded
Option a - axoba
b - dosta
C - festa
Ans - C
#Question on age A is half of b ,but twice of d something like who is youngest among
Ans - A


BLUE STAR QUESTION PAPERS


TCS SAMPLE PAPERS

TCS SAMPLE PAPERS.

1.  If 3y + x > 2 and x + 2y3, What can be said about the value of y?
A. y = -1
B. y >-1
C. y <-1
D. y = 1
Answer: B

Multiply the second equation with -1 then it will become - x - 2y
 - 3.  Add the equations.  You will get y > -1.

2. If the price of an item is decreased by 10% and then increased by 10%, the net effect on the price of the item is
A. A decrease of 99%
B. No change
C. A decrease of 1%
D. An increase of 1%
Answer: C

If a certain number is increased by x% then decreased by x% or vice versa, the net change is always decrease.  This change is given by a simple formula
 −(x10)2= −(1010)2= −1%.  Negitive sign indicates decrease.

3. If m is an odd integer and n an even integer, which of the following is definitely odd?
A. (2m+n)(m-n)
B.
 (m+n2)+(mn2)
C.
 m2+mn+n2
D. m +n
Answer: C and D (Original Answer given as D)

You just remember the following odd
 ± odd = even; even ± even = even; even ±odd = odd
Also odd x odd = odd; even x even = even; even x odd = even.

4.  What is the sum of all even integers between 99 and 301?

A. 40000
B. 20000
C. 40400
D. 20200
Answer: D

The first even number after 99 is 100 and last even number below 301 is 300.  We have to find the sum of even numbers from 100 to 300.  i.e., 100 + 102 + 104 + ............... 300.
 
Take 2 Common.  2 x ( 50 + 51 + ...........150)
There are total 101 terms in this series.  So formula for the sum of n terms when first term and last term is known is
 n2(a+l)
So 50 + 51 + ...........150 =
 1012(50+150)
So 2 x
 1012(50+150) = 20200

5. There are 20 balls which are red, blue or green.  If 7 balls are green and the sum of red balls and green balls is less than 13, at most how many red balls are there?

A. 4
B. 5
C. 6
D. 7
Answer: B

Given R + B + G = 17; G = 7; and R + G < 13.  Substituting G = 7 in the last equation, We get R < 6.  So maximum value of R = 6

6.  If n is the sum of two consecutive odd integers and less than 100, what is greatest possibility of n?
A. 98
B. 94
C. 96
D. 99
Answer : C

We take two odd numbers as (2n + 1) and (2n - 1).
Their sum should be less than 100. So (2n + 1) + (2n - 1) < 100
  4n < 100.
The largest 4 multiple which is less than 100 is 96

7.
 x2 < 1/100, and x < 0 what is the highest range in which x can lie?
A. -1/10 < x < 0
B. -1 < x < 0
C. -1/10 < x < 1/10
D. -1/10 < x
Answer: A

Remember:
(x - a)(x - b) < 0 then value of x lies in between a and b.
 
(x - a)(x - b) > 0 then value of x does not lie inbetween a and b. or (
 −∞, a) and (b, −∞) if a < b
x2 < 1/100 
(x2−1/100)<0(x2−(1/10)2)<0(x−1/10)(x+1/10)<0
So x should lie inbetween - 1/10 and 1/10.  But it was given that x is -ve. So x lies in -1/10 to 0

8.  There are 4 boxes colored red, yellow, green and blue.  If 2 boxes are selected, how many combinations are there for at least one green box or one red box to be selected?

A. 1
B . 6
C. 9
D. 5
Answer: 5

Total ways of selecting two boxes out of 4 is
 4C2 = 6.  Now, the number of ways of selecting two boxes where none of the green or red box included is only 1 way.  (we select yellow and blue in only one way).  If we substract this number from total ways we get 5 ways.

9. All faces of a cube with an eight - meter edge are painted red.  If the cube is cut into smaller cubes with a two - meter edge, how many of the two meter cubes have paint on exactly one face?
A. 24
B. 36
C. 60
D. 48
Answer : A

If there are n cubes lie on an edge, then total number of cubes with one side painting is given by
 6×(n−2)2.  Here side of the bigger cube is 8, and small cube is 2.  So there are 4 cubes lie on an edge. Hence answer = 24

10. Two cyclists begin training on an oval racecourse at the same time.  The professional cyclist completes each lap in 4 minutes; the novice takes 6 minutes to complete each lap.  How many minutes after the start will both cyclists pass at exactly the same spot where they began to cycle?

A. 10
B. 8
C. 14
D. 12
Answer: D

The faster cyclyst comes to the starting point for every 4 min so his times are 4, 8, 12, .........  The slower cyclist comes to the starting point for every 6 min so his times are 6, 12, 18, .........  So both comes at the end of the 12th min.

11. M, N, O and P are all different individuals; M is the daughter of N; N is the son of O; O is the father of P; Among the following statements, which one is true?

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgsO6y98PnUz8KiNa09CbQNEY9I_rgb87nPlX6tLZthcir7UsMV2cPj40naQ0wKPN8CsYvpQ8mABEBBiB4QofH4lQcRl5iqYJ3ZfVB1H44C_IN5AtokbUu449Q0wg3TSPYduE-UxWKfzHLe/s200/BR.pngA. M is the daughter of P
B. If B is the daughter of N, then M and B are sisters
C. If C is the granddaughter of O, then C and M are sisters
D. P and N are bothers. 
 
Answer: B

From the diagram it is clear that If B is the daughter of N, then M and B are sisters.  Rectangle indicates Male, and Oval indicates Female.



https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpUUiMYGjcZ8n0PVKNVNfImYhKVtAGQvC1b79Nall244AI0zRwfnYMY12grRmhUn2pkt6W3gRsKN9oJ7xi-on_MG7sshZcG8JwXtqAVsGNyvcSC8_K1xcmstchG-JAOugTgLW9DqAnL-PQ/s200/square.png12. In the adjoining diagram, ABCD and EFGH are squres of side 1 unit such that they intersect in a square of diagonal length (CE) = 1/2.  The total area covered by the squares is 

A. Cannot be found from the information
B. 1 1/2
C. 1 7/8
D. None of these
Answer:  C


https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi04GSZcpxScVfTxPaiM71k1UPYkOQXn-qwRVSMHoAUcVSCERXikQJIScsik-NWDPWLJ6XaO1N7grFTk7-VJ_fXPCOMQitu0BQUeeB66a_rkFX08hRHOhVEgrJiF4HH13ZV8cyz0BfyCcDa/s200/square+ans.png
Let CG = x then using pythogerous theoremCG2+GE2=CE2
  x2+x2=(1/2)22x2=1/4x2=1/8
Total area covered by two bigger squares = ABCD + EFGE - Area of small square = 2 - 1/8 = 15/8


https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTd5HMWpS2902k2Csqaz4pSM_nIdlgBruGQv3N2etRMR0rkQsbjMQioA21b9udsKfC-jZ-O9d0j8QQfzJvyGOdxsRMQS8GQxKe4c6V1QgdEy9suAWub9YDIs2ILuMWWx21HLhrP4ip2Hll/s200/Steps.png13. There are 10 stepping stones numbered 1 to 10 as shown at the side.  A fly jumps from the first stone as follows; Every minute it jumps to the 4th stone from where it started - that is from 1st it would go to 5th and from 5th it would go to 9th and from 9th it would go to 3rd etc.  Where would the fly be at the 60th minute if it starts at 1?
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj5tGKMKmaM2bPnhzq9o1cm2L3J5KB0CJf8R7mXZd3zbR6mLK6zokW3_VhKZ8lAQTzuqiyaBbw8UfjDl9jd6VO-kVEH6Kq1h7HHPE4FvI5lD0yFn4ngcxR8RXAObOOskHmlmDRuWuS-aE_f/s200/Frog.pngA. 1
B. 5
C. 4
D. 9

Answer : A

Assume these steps are in circular fashion. 
Then the fly jumps are denoted in the diagram.  It is clear that fly came to the 1st position after 5th minute.  So again it will be at 1st position after 10th 15th .....60th. min.

So the fly will be at 1st stone after 60th min.
 

 
 

14. What is the remainder when
 617+1176  is divided by 7?
A. 1
B. 6
C. 0
D. 3
Answer: C

617 = (7−1)17 = 
17C0.717−17C1.716.11.....+17C16.71.116−17C17.117

If we divide this expansion except the last term each term gives a remainder 0.  Last term gives a remainder of - 1.

Now From Fermat little theorem,
 [ap−1p]Rem=1
So
 [1767]Rem=1

Adding these two remainders we get the final remainder = 0

15. In base 7, a number is written only using the digits 0, 1, 2, .....6.  The number 135 in base 7 is 1 x
 72 + 3 x 7 + 5 = 75 in base 10.  What is the sum of the base 7 numbers 1234 and 6543 in base 7. 
A. 11101
B. 11110
C. 10111
D. 11011
Answer: B
 

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjZ_pM9oi4oTWsfJh_et0R7MnI6wjDn6GredCgU5-74hC0JPhKfHfgkihXhPpS3IIS8Gwp1z60HcSkJMedWnhI6GNDpRugKX92g-teZDmlS4qZ-mMcU93k5xZs1JDbPTPtTCa3KVsVZAKa_/s1600/7+sum.png
In base 7 there is no 7.  So to write 7 we use 10.  for 8 we use 11...... for 13 we use 16, for 14 we use 20 and so on.
So from the column d, 4 + 3 = 7 = 10, we write 0 and 1 carried over.  now 1 + 3 + 4 = 8 = 11, then we write 1 and 1 carried over.  again 1 + 2 + 5 = 8 = 11 and so on



16. The sequence
 {An} is defined by A1 = 2 and An+1=An+2n what is the value of A100
A. 9902
B. 9900
C. 10100
D. 9904
Answer: A
We know that
 A1 = 2 so A2=A1+1=A1+2(1)=4
A3=A2+1=A2+2(2)=8
A4=A3+1=A3+2(3)=14
So the first few terms are 2, 4, 8, 14, 22, ......
The differences of the above terms are 2, 4, 6, 8, 10...
and the differences of differences are 2, 2, 2, 2.  all are equal.  so this series represents a quadratic equation.
Assume 
 An = an2+bn+c
Now
 A1 = a + b + c = 2
A2 = 4a + 2b + c = 4
A3 = 9a + 3b + c = 8
Solving above equations we get a = 1, b = - 1 and C = 2
So substituting in
 An = n2+bn+c = n2n+2
Substitute 100 in the above equation we get 9902.

17.Find the number of rectangles from the adjoining figure (A square is also considered a rectangle)
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiW2CuD21xNsDtnm22v_EsxWaAy0q9H43oiT5yciUoNBQMKlf0MhUPEwK5QV0CFSdhWQLCbdVGb6wcauhVqmyfJtoO4I_a0qk3nnthAOjY1V_S5pkHabPXT_LCoq6T7zeUb0ZtXvMIGp3dN/s320/Rec.png
A. 864
B. 3276
C. 1638
D. None

Answer: C

To form a rectangle we need two horizontal lines and two vertical lines.  Here there are 13 vertical lines and 7 horizontal lines.  The number of ways of selecting 2 lines from 13 vertical lines is
 13C2 and the number of ways of selecting 2 lines from 7 horizontals is 7C2. So total rectangles = 7C2x13C2

18. A, B, C and D go for a picnic.  When A stands on a weighing machine, B also climbs on, and the weight shown was 132 kg.  When B stands, C also climbs on, and the machine shows 130 kg.  Similarly the weight of C and D is found as 102 kg and that of B and D is 116 kg.  What is D's weight
A. 58kg
B. 78 kg
C. 44 kg
D. None
Answer : C
 

Given A + B = 132; B + C = 130; C + D = 102, B + D = 116
Eliminate B from 2nd and 4th equation and solving this equation and 3rd we get D value as 44.

19.  Roy is now 4 years older than Erik and half of that amount older than Iris.  If in 2 years, roy will be twice as old as Erik, then in 2 years what would be Roy's age multiplied by Iris's age?
A. 28
B. 48
C. 50
D. 52
Answer: 48

20. X, Y, X and W are integers.  The expression X - Y - Z is even and the expression Y - Z - W is odd.  If X is even what must be true?
A. W must be odd
B. Y - Z must be odd
C. W must be odd
D. Z must be odd
Answer: A or C (But go for C)

21.  Mr and Mrs Smith have invited 9 of their friends and their spouses for a party at the Waikiki Beach resort.  They stand for a group photograph.  If Mr Smith never stands next to Mrs Smith (as he says they are always together otherwise). How many ways the group can be arranged in a row for the photograph?
A. 20!
B. 19! + 18!
C. 18 x 19!
D. 2 x 19!
Answer: C

22.  In a rectanglular coordinate system, what is the area of a triangle whose vertices whose vertices have the coordinates (4,0), (6, 3) adn (6 , -3)
A. 6
B. 7
C. 7.5
D. 6.5
Answer: A

23. A drawer holds 4 red hats and 4 blue hats.  What is the probability of getting exactly three red hats or exactly three blue hats when taking out 4 hats randomly out of the drawer and immediately returning every hat to the drawer before taking out the next?
A. 1/2
B. 1/8
C. 1/4
D. 3/8
Answer: B

24. In how many ways can we distribute 10 identical looking pencils to 4 students so that each student gets at least one pencil?

A. 5040
B. 210
C. 84
D. None of these
Answer: C

25. The prime factorization of intezer N is A x A x B x C, where A, B and C are all distinct prine intezers.  How many factors does N have?

A. 12
B. 24
C. 4
D. 6
Answer: A

26. Tim and Elan are 90 km from each other.they start to move each other simultanously tim at speed 10 and elan 5 kmph. If every hour they double their speed what is the distance that Tim will pass until he meet Elan 
A. 45
B. 60
C. 20
D. 80
Answer: B

27. A father purchases dress for his three daughter. The dresses are of same color but of different size .the dress is kept in dark room .What is the probability that all the three will not choose their own dress.
A.  2/3
B.  1/3
C.  1/6
D.  1/9
 
Answer: B

28. N is an integer and N>2, at most how many integers among N + 2, N + 3, N + 4, N + 5, N + 6,  and N + 7 are prime integers?
A. 1
B. 3
C. 2
D. 4
Answer: C

29. A turtle is crossing a field.  What is the total distance (in meters) passed by turtle? Consider the following two statements
(X) The average speed of the turtle is 2 meters per minute
(Y) Had the turtle walked 1 meter per minute faster than his average speed it would have finished 40 minutes earlier

A. Statement X alone is enough to get the answer
B. Both statements X and Y are needed to get the answer
C. Statement Y alone is enough to get the answer
D. Data inadequate
Answer: B

30. Given the following information, who is youngest?
C is younger than A; A is talled than B
C is older than B; C is younger than D
B is taller than C; A is older than D

A. D
B. B
C. C
D. A
Answer: B

31. If P(x) =
 ax4+bx3+cx2+dx+e has roots at x = 1, 2, 3, 4 and P(0) = 48, what is P(5)
A. 48
B. 24
C. 0
D. 50
 
Answer: A
Saturday, 15 September 2012

1. Find X^y+y^x=46. Find X and Y values?

2. 3 white chips, 7 blue chips, 16 green chips, 2 chips drawn from the box in succession what is the probability that one is blue and other is white?
a) 7/50 b) 8/30 c) 7/25 d) 20/26

3. If a person has to work 8 continuous day & he gets a rest on the 9th day. If a person starts on Monday. What is the day of 12th rest day?

4. How many liters of a 90% of concentrated acid needs to be mixed with a 75% solution of concentrated acid to get a 30 liter solution of 78% concentrated acid?
a) 8 b)9 c) 7 d)6

5. 3 cars A, B & C are in the race. A is twice as likely to win as B and B is thrice as likely to win as C. what is probability that B will win, if only one can win the race ?
a) ½ b) 2/5 c) 3/10 d) 1/10

6. A cow & Horse brought for Rs.2000. The cow is sold at a profit of 20% and the Horse is sold at a loss of 10%. Of The overall gain is Rs.40. The cost price of the cow is :
a) 700 b) 800 c) 1200 d) 1300

7. The sum of 3 consecutive numbers of the four numbers A, B, C, D are 4613,4961,5010,5099 then what is the largest number among A,B,C,D ?
a) 1948 b) 1463 c) 1601 d) 1550

8. George printing press can print an edition of newspapers in 12 hours while Paul’s press can print the same edition in 18 hours. What is the total no. of hours the press working together but independent of one another to print the same edition?
a) 15 b) 17.4 c) 7 d) 7.2

9. 87th number in the series 2, 10, 26, 50…….

10. 70, 54, 45, 41……. What is the next number in the given series?

11. If the sum of the numbers in each row column, diagonal are same then find the value of (Y+Z)
http://3.bp.blogspot.com/-ZIiuViHZess/UFSN8WlJOfI/AAAAAAAAAFM/xErg0LXRRP0/s1600/11.JPG





12. If the sum of the numbers in each row column, diagonal are same then find the value of (Y+Z)
http://3.bp.blogspot.com/-Ba80jtZhEhE/UFSNqSO02xI/AAAAAAAAAFE/irQ0uLTD1FQ/s1600/12.JPG


13. In the simple subtraction problem Below , sum single digits (not necessarily distinct) are replace by letters , find the value of 7*A + 7*B +6*C*D
     A 7  C   2
-   4  B  6   8
--------------
    5  4   3   D
a) 77 b) 95 c) 84 d) 70

14. How many polynomial functions f of degree >=1 satisfy f(X2) = (f(X)) 2 =f (f(X)).
a) 1 b) 0 c) 2 d) more than 2

15. What is the remainder when 50! (50 factorial ) is divided by 16 ^ 15 (1615)
Answer is: 1

16. 1,5,6 ,25, 26,30,31, 125,126,130,131,150,151,155,156,…………………
What is the value of 30th term in the given series?
a) 781 b) 3125 c) 776 d) 780

17. The climb from foot to top of a hill 800 meters, Jack can climb at 16 meters per minute and rests for two minutes or 20meters per 2 minutes and rest for one minute. Paul can climb at 10 meters per one minute and rest for one minute or

16 meters per minute and rest for 2 minutes. If take has to reach the top in exactly two hours. What is the maximum number of rests that he can take?
a) 41 b) 42 c) 40 d) 43

18. If the 20th term of an AP=560 and 30th term of AP=840 then what is the sum of 5th term and 40th term of the series.
a) 1450 b) 1560 c) 1260 d) 1340

19. Raj tossed 3 dices and there results are noted down then what is the probability that raj gets 10?
a) 1/72 b) 1/9 c) 25/216 d)1/8

20. The diagonal of a square is twice the side of equilateral triangle the ratio of Area of the Triangle to the Area of Square is?
a) √3:8 b) √2:5 c) √3:6 d) √2:4

21. Apple costs L rupees per kilogram for first 30kgs and Q rupees per kilogram for each additional kilogram. If the price of 33 kilograms is 11.67and for 36kgs of Apples is 12.48 then the cost of first 10 kegs of Apples is
a) 3.50 b) 10.53 c) 1.17 d)2.8

22. 1,2,2,3,3,3,4,4,4,4,1,1,2,2,2,2,3,3,3,3,3,3,4,4,4,4,4,4,4,4,…………………………………..
Then what is the 2532 position of the number in the sequence?
a) 2 b) 1c) 3 d) 4

23.
1,2,2,3,3,3,4,4,4,4,1,1,2,2,2,2,3,3,3,3,3,3,4,4,4,4,4,4,4,4,…………………………………..
Then what is the 2320 position of the number in the sequence?
b) 2 b) 1c) 3 d) 4

24. How many 7’s are there between 0 to 400?

25. The letters in the word ABUSER are permuted in all possible ways and arranged in alphabetical order then find the word at position 49 in the permuted alphabetical order?
a) ARBSEU
b) ARBESU
c) ARBSUE
d) ARBEUS

26. The letters in the word TALION are permuted in all possible ways and arranged in alphabetical order then find the word at position 33 in the permuted alphabetical order?

27. The letters in the word SHOVEL are permuted in all possible ways and arranged in alphabetical order then find the word at position 31 in the permuted alphabetical order?

28. 15 students join a summer course. Every day 3 students are on duty after school to clean the class rooms. After the course, it was found that every pair of students has been on duty exactly once. How many days does the course last for?
a) 35 b) 45 c) 105 d)none of these

29. Consider all permutations (i.e., arrangements) of digits 1, 2&3. We will say that a hit has been scored if at least one digit occurs in its proper position in the permutation. If 1 (one) occurs in the first position or 2 in the second position or 3(three) in the 3rd position in how many ways of these permutations is a hit scored?
a) 4 b) 1 c) 2 d) 3

30. If the word MONOS is permuted then the probability that O’s never come together?

31. Next number in the given series 1, 7, 8, 49, 50, 56, 57, 343,
Posted by anupam at 07:27 2 comments:

#First of all I want to clearly mention that tcs has changed its whole question bank as well as the question set. So ull 99% not be getting what u all are studying from the net ie the previous questions. Id request you to go thru them as well but the questions i am posting are equally important.

#The pattern is 80 mins and now 30 questions.

Q1. (#M40010866) TCS aptitude question geometry
Check this from the site http://www.m4maths.com

Q2. MOTHER +DAUGHTER+INFANT AGE IS 74. MOTHER AGE IS 46 MORE THEN DAUGHTER AND INFANT. AND INFANT AGE IS 0.4 OF DAUGHTER. FIND DAUGHTERS AGE.

Q3.  SOME CARDS QUESTION. PROBABILITY OF 1 ACE WHICH IS RED AND ONE SPADE. SOMETHING LIKE THIS. DO GO THRU THE CARDS QUES. THE DECKS AND EVERYTHING.

Q4.THERE ARE EXACTLY 4 THURSDAYS AND 4 SUNDYS IN A MONTH OF 31. FIND THE FIRST DAY. MY ANS WAS SHAYD MONDAY. U CAN CALCULATE EASILY.

Q5. THEN THERE WERE 2-3 QUESTIONS BASSED ON SPEED AND DISTANCE. EASY ENOUGH. ULL BE ABLE TO MANAGE THEM.
ONE WAS LIKE 2 CARS START FROM A POINT X. CAR1 START  AT 10 AM AND CAR2 AT SOME TIME. BOTH THE CARS GO TILL THEY REACH A T POINT. ONE TAKES LEFT OTHER RIGHT. IT WAS TO BE FOUND OUT HOW  MUCH WAS THE DISTANCE BETWEEN THE 2 CARS AT 2 PM.

Q6. ANOTHER TIME DISTANCE, A PERSON RUNS AROUND A RECTANGULAR FIELD. TIME GIVEN SPEED GIVEN. FIND THE DISTANCE. APPLY PERIMETER FORMULA 2(Length+breadth). And length and breadth ratio given. Find area.

Q7.THEN THERE WAS A SERIES COMPLETION QUESTION.
7^0,7^1 , 7^1+7^0,7^2… SOMETHING LIKE THIS BUT I WAS NOT ABLE TO SOLVE IT SOME ERRORENOUS DETAILS WERE TPRESENT

Q8 THREE GROUPS :: X1,X2,X3
A,B COMMON TO ALL THREE. THEN ATLEAST 1 ELEMNT COMMON TO 2 IE X1,X2,X2,X3,X3,X1. FINDMINIMUM ELEMENTS IN EACH GROUP. ANSWER IS 4.

Q9. U PEOPLE PROBABLY MUST HAVE DONE THE OPENSEESAME SAMPLE PAPER. THERE WAS 1 FLY QUESTION THERE. IT JUMPS AT EVEY TICK 4 STEPS. THERE WAS A SIMILAR QUESTION AND THE INSECT WAS JUMPING IN A CIRCULAR QUESTIONS.

Q10. Now A NEW ELEMENT.
THERE WERE2-3 VISUALIZING QUESTIONS ALSO.
A CUBE WAS GIVEN  IN 1D. WITH DOTTED LINES. FACE WERE MARKED. WITH 1 FACE AS X. U HAD TO TELL THAT WHAT WILL BE FACE OPPOSITE X WHEN IT IS FOLDED AS A CUBE.

Q11:
DI QUES
THERE WERE ATLEAST 6-7  QUESTIONS
LINES WERE GIVEN TO INTERPRET. WHOLE LOT OF LINES THEN WE HAD TO ANSWER 1 QUESTION BASED ON THE CONCLUSION

SOMETHING LIKE THIS(THIS QUES IS JUST A SAMPLE)
Directions for Q. 1 to Q. 5: Refer the data:
J, K, L, M and N collected stamps. They collected a total of 100 stamps. None of them collected less than 10.
No two among them collected the same number.
(i) collected the same number as K and M together.
(ii) L collected 3 more than the cube of an integer
(iii) The no. collected by J was the square of an integer.
(iv) Total no. collected by K was either the square or cube of an integer.
1. The no. collected by J was:
(1) 27 (2) 49 (3) 36 (4) 64
2. The no. collected by K was:
(1) 16 (2) 27 (3) 25 (4) 36
3. The difference of numbers collected by L & M was:
(1) 3 (2) 2 (3) 5 (4) 9




THAT’S ALL FROM MY SIDE.ILL TRY TO POST YOU MORE IF I CAN GET HOLD OFF.

MY ADVICE:

1. TRY TO DO ALL THE SMALL QUESTIONS FIRST. DNT WASTE MUCH TIME ON THE DI LIKE QUES 11.

2 THE TEST IS NEW AND TOUGH SO CUTOFF WILL BE LESS. I MYSELF ATTEMPTED ONLY 20 QUESTIONS, SO TRY NOT TO PUT ANY BLIND GUESSES.

MY BEST WISHES.
Posted by anupam at 07:07 No comments:
Thursday, 13 September 2012
Recent Question Pattern of TCS Campus Placement 2013. It is the very first version we found.

The answers of these question is given at d bottom. And if there is any other questions let us know & if we have we’ll let you know.

1. An empty tankbe filled with aninlet pipe ‘A’ in 42 minutes. after 12 minutes an outlet pipe ‘B’ is opened which can empty the tank in 30 minutes. After 6 minutes another inlet pipe 
‘C’ opened into the same tank, which can fill the tank in 35 minutes and the tank is filled find the time taken to fill the tank?



2. A boy wants to make cuboids of dimension 5m,6m & 7m from small cubes of .03m^3.Later he realized that he can make some cuboids by making it hollow.Then it takes some cubes less.What is the number of cubes to be removed

a)2000 b)5000 c)3000 d)7000





3. Leena cuts small cubes of 3 cubic cm each.She joined it to make a cuboid of length 10 cm,width 3cm, and depth 3 cm.How many more cubes does she need to make a perfect cube?

a)910 b)250 c)750 d)650





4. What is the distance between the z-intercept from x-intercept in the eqn ax+by+cz+d=0



5. 10 men and 10 women are there.They dance with each other.Is there possibility that two men are dance with same girl and vice versa?

a)22 b)20 c)10 d)none of these



6. A father purchases dress for his three daughter. The dresses are of same color but of different size .the dress is kept in dark room .What is the probability that all the three will not choose their own dress…

a) 2/3 b) 1/3 c) 1/6 d) 1/9



7. Mr and Mrs smith had invited 9 of their friend and their spouses for party at wiki beachresort.the stand for group photograph if mr smith never stand next to mrs smith then how many way group arrange in row.

(A)20!(B)19!+18!(C)18*19!(D)2*19!



8. Tim and Elan are 90 km from each other, they start to move each other simultaneously, Tim at speed 10 and Elan 5kmph, if every hour they double their speed what is the distance that Tim will pass until he meet Elan?
(A)45(B)60(C)20(D)80



9. MOTHER +DAUGHTER+INFANT AGE IS 74. MOTHER AGE IS 46 MORE THEN DAUGHTER AND INFANT.

AND INFANT AGE IS 0.4 OF DAUGHTER. FIND DAUGHTERS AGE.



10. The age of two people is in the ratio 6:8. the sum of their ages is 77. after 2 years the ratio of their ages becomes 5:7. wat is their present age?



11. A Grocer bought 24 kg coffee beans at price X per kg. After a while one third of stock got spoiled so he sold the rest for $200 per kg and made a total profit of twice the cost. What must be the price of X?
$33 1/3 B. 66 2/3 C.44 4/9 D.50 1/3



12. Let exp(m,n) = m to the power n. If exp(10, m) = n exp(2, 2) where to and n are integers then n = ………………?



13. Bhanu spends 30% of his income on petrol on scooter. ? of the remaining on house rent and the balance on food. If he spends Rs.300 on petrol then what is the expenditure on house rent?



14. Directions for Q. 1 to Q. 5: Refer the data:

J, K, L, M and N collected stamps. They collected a total of 100 stamps. None of them collected less than 10.

No two among them collected the same number.

(i) 3 collected the same number as K and M together.

(ii) L collected 3 more than the cube of an integer

(iii) The no. collected by J was the square of an integer.

(iv) Total no. collected by K was either the square or cube of an integer.

1. The no. collected by J was:

(1) 27 (2) 49 (3) 36 (4) 64

2. The no. collected by K was:

(1) 16 (2) 27 (3) 25 (4) 36

3. The difference of numbers collected by L & M was:

(1) 3 (2) 2 (3) 5 (4) 9





15. A,B COMMON TO ALL THREE. THEN ATLEAST 1 ELEMNT COMMON TO 2 IE X1,X2,X2,X3,X3,X1.

FIND MINIMUM ELEMENTS IN EACH GROUP.



16. How many kgs. of wheat costing Rs. 8 per kg must be mixed with 86 kg of rice costing Rs. 6.40 per kg so that 20% gain may be obtained by Belling the mixture at Rs. 7.20 per kg ?



17. The diagonal of a square is twice the side of equilateral triangle the ratio of Area of the Triangle to the Area of Square is?

a) √3:8 b) √2:5 c) √3:6 d) √2:4



18. Raj tossed 3 dices and there results are noted down then what is the probability that raj gets 10?

a) 1/72 b) 1/9 c) 25/216 d)1/8



19. 16 meters per minute and rest for 2 minutes. If take has to reach the top in exactly two hours. What is the maximum number of rests that he can take?

a) 41 b) 42 c) 40 d) 43



20. length of minute hand is 5.4 cm, area covered by this in 10 min is ?

a)50.97 b)57.23 c)55.45 d)59.14





21. The climb from foot to top of a hill 800 meters, Jack can climb at 16 meters per minute and rests for two minutes or 20meters per 2 minutes and rest for one minute. Paul can climb at 10 meters per one minute and rest for one minute or16 meters per minute and rest for 2 minutes. If take has to reach the top in exactly two hours. What is the maximum number of rests that he can take?

a) 41 b) 42 c) 40 d) 43





22. there r three buckets..of 8,5 n 3 litres…out of which only 8 ltr bucket is fully filled…u hv to fill exact 4-4 ltr liquid in 8 and 5 litre bucket by using only these buckets in minimm num of steps…..





23. A number has exactly 3 prime factors, 125 factors of this number are perfect squares and 27 factors of this number are perfect cubes. overall how many factors does the number have???





24. there are two boxes,one containing 39 red balls & the other containing 26 green balls.you are allowed to move the balls b/w the boxes so that when you choose a box random & a ball at random from the chosen box,the probability of getting a red ball is maximized.this maximum probability is

a)60 b)50 c)80 d)30



25. A dog taken four leaps for every five leaps of hare but three leaps of the dog is equal to four leaps of the hare. Compare speed?



26. The milk and water in two vessels A and B are in the ratio 4 : 3 and 2: 3 respectively. In what ratio, the liquids in both the vessels be mixed to obtain a new mixture in vessel C containing half milk and half water?



27. In what ratio must water be mixed with milk to gain 20 % by selling the mixture at cost price?



28. x=(sin nx/n)=?



29. How much water must be added to 60 litres of mixture of milk? 1 ½ litres of milk for Rs. 20. So as to have a mixture worth Rs.10⅔ a litre ?



30. Find the no of zeros in the product of 1^1*2^2*3^3*…..*49^49?



31. N is an integers and N>2 at most how many integers among N+2,N+4,N+5,N+6 and N+7 are prime integers?

a) 1 ,b)3 ,c)2, d)4



32. The sequence {A(n)} is defined by A(1)=2 and A(n+1)=A(n)+2n. What is the value of A(100).



33. n! has 13 zeros than wat is the higest and lowest value of n??

CAUTION : CAN NOT Be CONSIDERED to be legit :P , SOURCE : AS AVAILABLE OVER THE INTERNET
In SRM University .. the apti ques were totally different frm rest of other col gets nt even single ques of other col guys got ... don't depend on new pattern or old pattern ...prepare both ... so guys prepare well .....some of the ques dt was asked in SRW r....

1.f(n) is a function...where f(f(n))+f(n)=2n+3.
f(n)=0;find f(2012)
 
2.one man can do fill the truck in 9 min; how many truck can be filled in one and half hours when 16 men work together?
 
3.what is the probability of throwing 3 dices to get a sum of 10?
4.wat s 1st of jan.. when it has 4 thursdays and 4 sundays in that month?
5.in six yrs, raj father's age is twice raj's age. before 2 yrs raj mother's age is twice as raj's age. raj age is 25 years ... 3 yrs from now.. wat is sum of raj's parents age?
6.1-2,2-3,3-4,....-98+99=?


will try to post other questions soon....ALL THE BEST GUYS TRY HARD SURE U LL..!!

Some sample TCS questions which came yesterday in GCE, Aurangabad:

1.there are 4 exactly Sunday and 4 Thursday in the month of 31 days.so find the 1st day of tht month.

2.sum of 2 no is 50 and sum of there reciprocal is 1/12. So find these number.

3 there was 1 Q based on critical reasoning.

4. I had 6 -7 Q on time and work,time and distance, probability, ages. But don’t remember it nw.

5. I don’t remember the exact value. But the Q was-
 Wht should be added in  6440 that is when divided by 460 gives reminder 35.

7.Arun was all bent on building a new house. He carefully got the blue print of his house designed buy his friend Ashwin, a civil engineer. He wanted to build a room of dimension 27 by 48 ft and lay tiles in this room. Each tile was of dimension 2 by 3 ft. How many tiles should Arun buy?
   216

8.Father is aged three times more than his son Ronit. After 8 years, he would be two and a half times of Ronit's age. After further 8 years, how many times would he be of Ronit's age? a.2 b.5/2 c.3/2 d.1

Ans A)2 times.
Given F=3S+S=4S ----(1)
F+8=5/2(S+8)----(2)
By Substituting F=4S in (2) We get S=8
Therefore F=32.
Since After 16 years,F=48,S=24
So Father's age after 16 years is 2 times of Son's age.


9.Roy is now 4 year older than Erik and half of that amount than Lewis.If in two years Roy will be twice as old as Erick,then in two year what would be Roy age multiplied by Lewis age??
ans is 48
firstly two equation from 1st sentence ..
suppose roy=x, erik=y, lewis=z
so x=y+4....(1)
2nd is x=z+2...(2) (Roy is now 4 year older than Erik and half of that amount than Lewis so 4/2=2)
also after 2 years erik and roy relation wil b
x+2=2(y+2).. (3)
so put this into 1st equ. u will get y=2..
and then x=6,z=4(by substituting other)
nw asking multiplication after two years of roy n lewis is (6+2)*(4+2)=48..

10.If there are maximum acute angles then how many convex hectagons are there?


11.if a divided by 5,3,2 respectively  give the remainder 1,2,0.what is the no when is divided by 2 3, 5
number

12.How many polygon function of degree less than equal to 1 satisfy f(x)^2={f(n)^2={f{f(x))

13.The number of bacteria was growing in a city exponentially.at 4 pm yesterday , the number of bacteria was 400 and at 6 pm yesterday it was 3600.How many bacteria were there at 7pm yesterday?
10800

14.maximun number of identical pieces(of same size) of a cake by making only 3 cuts? -6

15.Find the area (in square units) of the triangle formed by 2x+3y=5, y=x and X-Axis.

the points of intersection for lines:
2x+3y=5 and x=y => 5x=5 => x=1 and y=1 =>(1,1)
x=y and y=0(x-axis) => x=0 and y=0 =>(0,0)
2x+3y=5 and y=0(x-axis) => 2x=5 => x=5/2 and y=0 =>(5/2,0)

area of triangle with vertices (x1,y1),(x2,y2),(x3,y3) is
|x1(y2-y3)+x2(y3-y1)+x3(y1-y2)|/2
=|1(0-0)+0(0-1)+5/2(1-0)|/2
=|1+5/2|/2
=7/4 sq units...

16.The ratio of perimeter of an equilateral triangle having an altitude equal to the radius of the circle, to the perimeter of an equilateral triangle inscribed in that circle is ?

17.35674 term in 1 ,2,3,4,5,6,7,8,9,10,11,12,13....
35674

Posted by anupam at 07:00 1 comment:
Wednesday, 12 September 2012
tcs placement drive in pondicherry engg. college!!
11th-12th september,2012
Ashish Kumar Singh  shares his experience
i had to write aptitude as my 10 th percentage was 74.5 % and not 75 % nevertheless if u do things the right way there is nothing stopping you from getting placed even when people keep saying its gonna be hard this year.

i will share my experience with you all.

11th morning the aptitude rounds started.it was online.there were 30 questions and 80 mins to do them. there were puzzles too as expected this year but also there were questions which were doable and anyone who has practiced quants can answer them.i just attempted 15 out of 30 questions.and most of them were right according to my intuition.dont panic when u come to a question which luks tough.just skip it.u will surely find questions which u can solve.dont go for blind guesses am far as possible as there is negative marking too.ur accuracy should be good.i think that plays an important role for clearing aptitude.

around 300 people attended apti round and the results were announced on 11th evening. 102 people cleared the apti.

day-2: the interviews began today morning.there were around 24 panels and each panel had 3 interviewers.separate panels for it and eis.just walk in the room with confidence.dress well.greet all of them with a smile .shake hands.and take the seat when u r offered.be clear in what u say and express yourself with confidence.according to my personal experience,i think they r luking for soft skills in u more than ur technical skills.but u should be ready with the technical part too.for me they dint ask much technical questions.just about my project.2,3 simple questions from my area of interest - computer networks.then there were normal hr questions.again the key is to be precise and clear.the interview lasted for 15 mins.some of my friends did have to face quite a few technical questions.they told me that the key is not to say more than asked for as they tend to form questions from your answers avoid using technical jargons which you are not clear with, but if you do know what you are talking about then go along with it. Be clear in explaining the concepts to them,

today evening around 7.30 results were announced and dey selected aroun 140.

remember confidence and ur communication skills is the key!!

all the best guys!!if u deserve it u will surely get in.

 ..............................................................................................................

##Kishore Kumar ' shares his Interview Session :)

Congrats Kishore Kumar !!
 

So here it goes


MY Interview experience (30th Aug - 2011, at 12.25pm)
MY "2-MINUTE" TCS INTERVIEW EXPERIENCE:

Interview Panel: Two Middle Aged men (I represent as HR-1 & HR-2)
Place: Vice Chairman Room (2nd hall to reception)

I was a bit nervous, on looking at previous candidates of same panel, for whom questions were from digital, microprocessor. I was a bit nervous and I lose hope entirely and came to mentality that "I CANT surely get thru"..

I thought "Anyhow I CAN'T get thru, summa I need to jus show some getthu in interview"
and I entered in wit blank mind and wit some confidence..

HR-2 peeked at me and I gave him a good smile and wished "Happy noon sir"
He returned me a smile and wished me back

HR-1 was busy looking my xerox copy of certificates.

Next,

HR-2: Wel Kishore right ? Have ur seat man!

ME: (smiling) thank u sir!!

HR-2 : Wel Kishore, let me hear something abt u!!

Me : Sure sir. I am Kishore, doing final year B.Tech in field of infrmation technology in Sri mankula vinayagr eng colg.
I had done my schooling in 7th day adventist til from 1st til 12th standard, and cleared out scoring 87% and joined this colg in merit seat.

regarding my family, My dad Mr.Sudarsan is working in private factory and my mom Mrs. Latha is an excellent home maker. My bro karthik is working for an private BPO.
Well .. thats all abt me sir

(Now HR-1 looked up at me and asked)
HR-1: Well u have created an website for ur placements right ?? wel wats exactly was it ..

ME: (looking at both of them) Of Course Sir! I had created IT GROUPS and PLACEMENT SITE for my colg. Actually the main objective was to share information so that the information can reach all..

actually this has been created using webs.

(HR-2 interrupted me and asked)
HR-2: Wel how did u created it actually.. and wats the platform u used and webserver ??

ME: Sir actually its created using free domain called webs, and the webserver itself allows to store 5MB of files.. it has many predefined templates and itself allows editor tools to edit pages easily.

HR-1 : so u havent created it using HTML? U have jus created using templates that already were there.. isnt so.. wats spl in it ??

ME: wel sir. i created the site in my 5th sem, and i had HTML as a subject only in 6th sem. by the time i created the site i only knew HTML a bit , but not wel wel versed .. now i am trying learning it in detail to deploy using html..
(MIND VOICE: epadaiyao samaalichen da saami)

HR-1: wel wats the difference between XML and HTML..
(I Immediately replied)
ME: Sir,. user defined in xml and predefined tags in html.. sir also..

HR-1 interrupted me and asked "Well y tcs?"

ME: Wel sir, TATA itself has an brand name. WE CAN SAY ALMOST IN ALL DOMAINS TATA has established its level. Sir for example .. consider this tea (I pointed to a tea cup) .. this can be tetley tea.. a product of TATA..

Consider the TAP (Pointing to the steel tap).. this steel may be made of TISCOL... a product of TATA.. Like wise TATA has domain in almost all fields and since I am from an IT backgroud I prefer TATA's Software firm . ie TCS..

HR-2 Smiled ..and asked wel that cud also be an AVT tea and Steel cud also be some othr brand na ??

ME: smiling a bit well.. of course yes sir .. i cud be also.. but thers a probability that this cud be TATA's make..

HR-1 and HR-2 smiled & exchanged faces for a BIT of second!!
(IT WAS AN REMARKABLE SMILE OF MY LIFE)

HR-1: wel fine Kishore !! is there anything u need to know abt TCS ??

ME : (2 seconds delay) No Sirrr!

HR-2: R u sure ??

ME: YES sir .. boldly and a bit aloud!

HR-2 : Ok u can leave..

ME: ok sir.

I went til door and at that time i remembered to wish them .. i turned back a bit while holding the door latch pulling it and said..
(to both of them)
have a nice day sir .. Thank u..
have a nice day sir .. Thank u..

thank u..

they too nodded back..

I returned..

On returning i was fully loaded wit heavy pain in heart, (Thinking AYYO POCHE!! )

After that Meiappane sir comforted me and said a few good words..

slept in class til 4.45 pm after lunch and waited for result.

(I still had a prayer to my soul to get me a chance get thru)

Till 7.30pm, i was fully loaded wit many memories and events that happened in all my 3.5 years of colg life..

Atlast came result from Cailasaame sir, names of all sorrouding me wre read ..

altlast wit my name in 29th order in 38..

GOsh my life came back!!!!!

Thanked GOD! and ringed my dad to inform !!

Thank GOD!
...........................................................................................................
All the BEST GUYS DO PREPARE WELL !
Posted by anupam at 10:57 No comments:
Tuesday, 11 September 2012
http://3.bp.blogspot.com/-E6kIRL315n4/UFAmjZvnbQI/AAAAAAAAADw/QJ5h3Q7nwOA/s640/1.JPG
http://3.bp.blogspot.com/-3Y7bATq0eKg/UFAmjv-SqvI/AAAAAAAAAD8/xCvHHnWPags/s640/2.JPGhttp://4.bp.blogspot.com/-VWkVNQujSyY/UFAnL8CuonI/AAAAAAAAAEo/gmWc52a7z2U/s640/6.JPG


http://3.bp.blogspot.com/-fyocGsCSt8I/UFAmk-g9hzI/AAAAAAAAAEg/m_VJTzJykfY/s640/5.JPG

DISCLAIMER: Please note that this Mock test is intended to be supplementary and cannot substitute thorough preparation. Questions in this picture are  a collective resources which are available over the Internet.However, test patterns and questions are likely to change anytime without notice.

Posted by anupam at 23:21 No comments:
Monday, 10 September 2012

1.What are the differences between voltage and current controlled devices?
Ans-In any (electronic) device controlling parameter is current it is called current controlled device. eg bilpolar transistor- output current is a function of base current.
In any (electronic) device controlling parameter is voltage it is called voltage controlled device. eg Field effect transistor- output current is a function of gate voltage.
It depends on the inherent physical mechanism which defines the primary (independent) controlling parameter.

2- What is the difference between Power Amplifier and Voltage Amplifier?
Ans-Power amplifiers basically amplify both current and voltage (p=v*i). Voltage amplifiers only amplify the voltage.
In power amplifier feedback employed is current feedback and In voltage amplifier voltage feedback is employed.

 3- why the bjt is known as current controlled device and fet is known as voltage controlled device ?
Ans- 1. In BJT because of the current the output will vary.
       2. Where as in FET by means of Voltage the output is varied.

4-What is the difference between DCS & PLC & SCADA ?
Ans-PLC stands for Programmable Logic ControllerDCS for Data control SystemSCADA for Supervisory Control And Data Acquisition SCADA involves supervision by a user in most cases the plant controller.Whereas PLC is the means by which he performs the function of SCADA.DCS on the other hand stand only to control the system and not to log any datain the process of controlling.DCS controllers are faster than PLCs In DCS controller we can adjust the scan time DCS are costly more inputs and outputs are there for DCS and SCADA does not have a dedicated controller. In a DCS system there is SCADA  ystem already in it but for PLC sydtem addition all SCADA software must be provided.

5-What is the difference between Silicon Controlled Switch (SCS) and Gate Turn-off Switch (GTO)?
Ans-scs is nothing but it is the silicon controlled switch as an SCR but gate turn off is that in which one of the turnoff method of SCR

6-What is the difference between emulator and simulator?
Ans-Simulator: A software program impersonating a Hardware. Thus SIMULATING the scenarios faced in the original hardware.
Emulator: A Hardware (with or without software) impersonating another Hardware. Thus ELIMINATING the need for the original.

7- What is the difference between Circuit Switching and Packet Switching?Ans-Circuit switching is the transmission technology that has been used since the first communication networks in the nineteenth century. In circuit switching, a caller must first establish a connection to a callee before any  communication is possible. During the connection establishment, resources are allocated between the caller and the callee.    
packet switching is a more recent technology than circuit switching which addresses a disadvantage of circuit switching: the need to allocate resources for a circuit, thus incurring link capacity wastes when no data flows on a circuit. Packet switching introduces the idea of cutting data on a flow into packets which are transmitted over a   network  without any resource being allocated.                            

 8- the number of columns in a state table for a  sequential circuit with m flip-flops and n inputs is.
Ans-Its 2m+2n because..  If there are m flip-flops there should be 2m nodes. If there are n inputs then each node will have 2n.
Q-Design a digital circuit which has one input two output and one select line input should be 1000khz output should be 500khz and 250Khz
select line either 0 or 1
if 0 select 250khz
if 1 select 500khz
Ans-demux is the circuit which satisfies the given requirement if 0 is given to the selectline 250khz o/p is provided else 500khz o/p is provided.

9- What are digital elctronic flip flops, State the different types of flip flop and their uses.
Ans-Digital electronic flip flops are temporary single bit storage devices. Different types of flip flops are JK f/f RS f/f T F/F D f/f this flip flops are using as storage device delay purpose as counter for toggled as shift register etc

10- What is the difference between latches and flip flop ?
Ans-Latche is a bistable circuit which responds to change of logic level as they occur. It has no external inputs.
Flip flop is a basic element of memory. It stores a single bit. It has a multiple input.
Latches are level sensitive devices where as  Flipflops are edge sensitive device so it is said that latches are level triggered and flip flop is edge triggered.

11-What is the Tri State of a Signal?
Ans-In digital ciruit the gate output can be only high or low. In highstate the output source current at a minimum voltage greater than ~2.8V if load(fan out ) is proper. In low state it will sink current at max output voltage less than ~0.8V.
Some times it is desirable to have a state output both not high or low. with neither sinking or sourcing (with high output impedance). This is called tristate. Tristate output cannot change output condition of succeding logic gates unless tristate is disabled.

12- what is the main difference between 8085 and 8086 processors?
Ans-8085 is a 8 bit microprocessor,having 16-bit address bus.8086 is a 16-bit microprocessor having 20-bit address bus.
 Q- What is a sequential circuit and What is a combinational circuit? Is there any difference between them? If yes what is it?
Ans-Combinational circuit are those whose output depends only upon the present inputs but in sequential circuit the output depends upon both present and past inputs. that is the difference
Combinational circuit does not have any memory in the feedback path but the sequential circuit has memory in the feedback path.
Ex of SEQ Circuit: Encoder Decoder etc
Ex of Comb Circuit; Flipflop

13.    What is the difference between masking and non-masking?
Ans-In 8085 processor TRAP is a non maskable interrupt.
Whereas RST 7.5 6.5 5.5 intr are maskable interrupts.
Maskable means this interrupts can be left without considering during the execution of the program.
Non maskable depicts that it has to be taken into account during the execution of the program

14.    What is difference between Fixed-Bias Circuit & Self-Bias Circuit?
Ans-Fixed bias circuits get their bias voltages from independently designed reference voltage sources (or even something as simple as a voltage divider). Often is the case that the bias may be left for the end-user to give some control over the operation point of the circuit.        
Self biased circuits get their bias voltages from the circuit itself often in the form of a negative feedback. This is very useful when a circuit is extremely sensitive to bias points and it becomes impractical to provide external biases that are correct to very high accuracies. This can happen in high gain amplifiers with very high impedance output nodes such as a common source amplifier with an active load. The operation of the circuit dependson the bias of the active load. It would therefore be desirable to sacrifice some of this gain by providing a negative feedback from the output to the gate of the active load. This way you wont have to bias the circuit yourself but will lose some of the gain of the circuit as a price.

15.    What is meant by filter? What are the different types of filters?
Ans-Filters are the components of a circuit which remove distortion or ripples.Types of filters :
1. High pass filters
2. Low pass filters
3. Band pass filters

16.  what is meant by virtual ground in the op amp ?
Ans-Ideally the output of op-amp should be zero. So for this to happen the 2 inputs must be same. Hence one of the input is considered to be low or at ground potential. But this input is not actually ground hence it is called as virtual ground.

17.    What is meant by saying at what current is transistor biased?
Ans-Bias current of a transistor is the preset DC current when no input voltage signal is applied to it.

18.    What is Race Around Condition in a JK FlipFlop?
Ans-IN J-K FF , The clock time is higher than the output toggling time then for J=1 & K=1 , the output will be changed irrelavent of our input. This condition is known as "RACE AROUND CONDITION"..

19.    How to Convert Binary to Excess 3 Code and vice versa?
Ans-A number i binary can be converted to excess-3 just by adding the binary equivalent of 3 to the binary number.similarly a number in excess-3 can be converted to binary just by subtracting the binary equivaent of 3 from the binary number.

20.    How to convert Binary to Gray Code
Ans-Take XOR of binary no. starting from right with the next bit. Add 0 as leftmost bit to get answer eg. Â 111=7
gray code 0 xor 1,1 xor 1, 1 xor 1 i.e. 100 ans.




21.    What is the meaning of Tristate Signal in Electronics?
Ans-Tristate device is 3 terminal device & it has three states. They are logic 0 logic 1 & high impedance state or tristate. This device can be used as switch. For ON logic 0 or logic 1 (depending on active low or active high appl) OFF as high independence state.

22.  When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?
Ans-The answer is simple. Consider the PN diode for Ge 0.3eV is the breakdown voltage and in the case of Si its 0.7eV since the impurities are added in the same amount the bond due to the other atoms of the Si makes it resistive compared to the Ge.. thats all!

23.    Why gold is added to the p-n junction?
Ans-To reflect heat. To reduce the recombination time.

24. Why are the 2 input terminals of an op-amp are called as inverting & non-inverting terminals?
Ans-Because if we give input to one input means that will produce the same phase output where as the other(Inverting) pin produce 180 degree phase shifted output.

25.  What is the equivalent of negative logic AND gate?
 Ans-Negative logic of AND gate is NAND.

26.    What are the main advantages of synchronous circuit?
Ans-All the inputs are feed at the rising or falling end of the clock signal. This makes the circuit to perform task in sync. so that the functional integrity of the logic device is as expected.

27. How does a Signal differ from a Wave
Ans-Signal means information. Wave is something that carries the information from source to destination.
28.    Why do we use two ground pins in the pin diagram of 8086?
Ans-There are basically two reasons for doing so one is to remove GROUND BOUNCE one more reason is circuit complexity demands a large amount of current flowing through the circuits and multiple grounds help in dissipating the accumulated heat so that device will be safe.

29.    What is the difference between Power Amplifier and Voltage Amplifier?
Ans-Power amplifiers basically amplify both current and voltage (p=v*i).
Voltage amplifiers only amplify the voltage.

30. How to manufacture the CMOS inverter?
Ans-It can be made by using pmos and cmos in series. Both gate are connected together and act as input. Source of pmos is connected to supply. drain of pmos is connected to drain of nmosand it serves as output. source of nmos is grounded.

31.    What are the advantages of using C band for satellite communication?
Ans-Its frequency ranges from 12 to 18MHz

32.    What is a BCD? What are its advantages and disadvantages? Why is an excess-3 code is called an unweighted code?
Ans-BCD means Binary coded decimal its advantage is it can represent decimal numbers in the form of binary value says (0000-0 to 1001-9).
Binary codes are divided into weighted binary code and non weighted binary code  Excess 3 code is an example of non weighted codes since the position of each bits in excess 3 code does not have weights says like ones tens hundred in decimal and 2^0 2^1 2^2 in binary.

33.    What is power electronics?
Ans- Power electronics is the technology associated with high power which is more than 430v 3 phase  supply.Generally it is consider in industries for the efficient conversion control and conditioning of electric power by static means from its available input form into the desired electrical output form.

34.    What are the differences between microprocessor and micro controller.
Ans-The microprocessor is the integration of a number of useful functions into a single IC package.
These functions are: The ability to execute a stored set of instructions to carry out user defined tasks. The ability to be able to access external memory chips to both read and write data from and to the memory.
Basically a microcontroller is a device which integrates a number of the components of a microprocessor system onto a single microchip.
So a microcontroller combines onto the same microchip : The CPU core Memory (both ROM and RAM) Some parallel digital I/O Essentially a microcontroller is obtained by integrating the key components of microprocessor RAM ROM and Digital I/O onto the same chip die. Modern microcontrollers also contain a wealth of other modules such as Serial I/O Timers and Analogue to Digital Converters.

 35.    What is function of ALE in 8085 microprocessor?
Ans-AlE stands for the address latch enableit 's working is that it differentiate the address and data bus in microprocessor.when it is high it select address bus .when it is low it select data bus.

36.    Why we are using the bridge rectifier in most of the circuits instead of full wave rectifier eventhough the output of both are same?
Ans-In bridge type (FWR) rectifiers center tapping transformer are not required so small transformers are used and we will get twice of the out put voltage that of the center tapped FWR.

37.    What type of architecture is used in 8085 microprocessor?
Ans- INTEL 8085 is a 8-bit microprocessor.
It's based on Von-Neumann architecture in which the data and instructions are in the same memory space without any distinction between them.
Data line: 8-bits--Can process 8-bits of data at a time.
Address line: 16-bits--Can address upto 2^16(64KB) of address space.

38.    What is Edison Effect?
Ans-Edison Effect is also refferred as "Thermionic emission". Here the charge carriers flow from a charge-carrying surface due to vibrations caused by thermal energy.
This phenomenon can be seen in the house-hold electrical bulb in which is a metal filament is heated by the thermal energy from electricity.

39.    how to design a software IC using VHDL ?
Ans-you can use software like altera write the required programme download to the chip here is your software ic

40.  What are semiconductor devices ?
Ans-Semiconductor Devices is nothing but a device which conduct semi /partially conducting ( semiconductor which conduction property lies between conductor and insulator)is termed as semiconductor device.

41.    Why the input resistance of an ideal OP-AMP is infinite and output resistance is zero?
secondly, how can we measure these resistances(input and output) in case of an ideal OP-AMPand Real OP-AMP in the following conditions when
1- load is not connected.
2- load is connected.
Ans- Ideal OP-AMP is a power ful concept.
If one goes through the history of amplifying devices it becomes clear that less it loads the previous stage better the output signal. ie. it is a trend toward higher and higher input impedances.
Also it is better to maintain the signal level irrespective of the LOAD connected at the ouput. Lesser the output impedance less the signal amplitude reduction when load is connected. ie. it is a trend toward lower and lower output impedances.
As ideal opamp is a concept by virtue it has zero output impedance and infinite input impedance and they are not physically measurable but has to be taken for granted for the use in theoritical analysis.
To measure input resistance of non ideal opamp connect a known source at the input and give a signal (within Specifications) through a current meter of sufficient precision. Input voltage by current gives the input impedance.
To measure input resistance of non ideal opamp connect a known source at the input and give a signal (within Specifications) through a current meter of sufficient precision. Input voltage by current gives the input impedance.
To measure output resistance of non ideal opamp connect a known source at the input such that the output does not saturate and connect a load (within Specifications ) through a current meter of sufficient precision and meaure the output voltage. Output voltage by current gives the output impedance.
Please refer application notes by device manufacturers freely available in internet for more precise and practical solutions.

42.    What is Pulse Width Modulation?
Ans-Pulse width modulation is a modulation technique in which the width of the pulse is varied in accordance with the message signal. Pulse width Modulation is abbreviated as PWM.
PWM can be used to reduce the total amount of power delivered to a load without losses normally incurred when a power source is limited by resistive means. This is because the average power delivered is proportional to the modulation duty cycle. With a sufficiently high modulation rate, passive electronic filters can be used to smooth the pulse train and recover an average analog waveform.        
PWM is used in sound synthesis circuits.

43.    How many type of resistor are there in diode?
Ans-They are two types one is forward resistance
1.Forward resistance
2.Reverse resistance
1.Forward resistance-This is the resistance offered in forward bias condition of the diode. It is calculated by with the help of graph for voltage and current characteristic.
2.Reverse resistance-This resistance is offered in the reverse bias condition of the diode. It is also calculated by the same method.

44.  Why the shape of OP-AMP is triangular not other shape?
Ans-The Triangular shape symbolizes that it works for continous signals and hence forth it is an analog device. ex: Opamp
If it is square then it is digital device. ex: Multiplexer
If the shape is both triangular and square then it is mixed signal device. ex: ADC DAC

45 What is Interfacing?
Ans-The peripheral (simple input/output devices ) connected with computer to perform tasks is known as interfacing.

 46 How microprocessor works without internal memory?
Ans-microprocessor works without internal memory because it consists of adreess data and control buses with some registers to process the task given to processor through the external memory.

47. What is a sequential circuit and What is a combinational circuit?Is there any difference between them? If yes what is it?
Ans-Combinational circuit are those whose output depends only upon the present inputs but in sequential circuit the output depends upon both present and past inputs. that is the difference.

48. What are digital elctronic flip flops, State the different types of flip flop and their uses.
Ans-digital electronic flip flops are temporary single bit storage devices.different types of flip flops are JK f/f RS f/f T F/F D f/f this flip flops are using as storage device delay purpose as counter for toggled as shift register etc


49.  What CMOS Transistor?
Ans-CMOS-->>Complementary Metal Oxide Semiconductor       
Complementary metal–oxide–semiconductor (CMOS) is a major class of integrated circuits. CMOS technology is used in chips such as microprocessors microcontrollers static RAM and other digital logic circuits. CMOS technology is also used for a wide variety of analog circuits such as image sensors data converters and highly integrated transceivers for many types of communication.
CMOS is also sometimes explained as complementary-symmetry metal–oxide–semiconductor. The words "complementary-symmetry" refer to the fact that the typical digital design style with CMOS uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic functions.
Two important characteristics of CMOS devices are high noise immunity and low static power supply drain. Significant power is only drawn when its transistors are switching between on and off states; consequently CMOS devices do not produce as much heat as other forms of logic such as TTL (transistor-transistor logic). CMOS also allows a high density of logic functions on a chip.
The triple compound "metal–oxide–semiconductor" is a reference to the nature of the physical structure of early (and interestingly now the very latest) field-effect transistors having a metal gate electrode placed on top of an oxide insulator which in turn is on top of a semiconductor material. Instead of metal current gate electrodes (including those up to the 65 nanometer technology node) are almost always made from a different material polysilicon but the terms MOS and CMOS nevertheless continue to be used for the modern descendants of the original process. (See also MOSFET.) Metal gates have made a comeback with the advent of high-k dielectric materials in the CMOS transistor as announced by IBM and Intel for the 45 nanometer node and beyond

50 . What is Virtual Grounding?
Ans-Virtual grounding is the shorting of the inverting and the non-inverting terminals of the op-amp.
 The i/p resistance of opamp is v high. thus the base currents are v less approx 0. thus no current flows thru i/p resistance. thus we can say that both the NI and INV terminals of opamp are virtually shorted. i.e the voltage across both terminals is same. thus if NOW one terminal is grounded due to virtual short other terminal also will be grounded.


51.  Why the input impedance of OP-Amp is so high?
Ans-In OPAMP we have 4 stages 1st stage i.e the input stage is a dual i/p balanced o/p opamp whose i/p resistance is v high. and if we use FET in case of BJT for 1st stage diffamp then i/p resistance will be v high in M ohms.

52.   what is meant by virtual ground in the op amp ?
Ans-The op amp connected in a negative feedback configuration that is the o/p connected to the inverting terminal tried to produce the same voltage at the inverting node as we applied to the non-inverting terminal no matter whatever be the o/p. This happens because the opamp has a very high differential gain. so only way to not to clip or saturate the o/p in either positive or negative side is to make their both i/ps at the same potential. so when you apply the i/p to the inverting terminal and you connect the feedback to the inverting node and your non-inverting terminal is grounded then op amp tries to force the inverting node at the ground potential and whatever the difference between these two nodes are amplified.

53.  Which one is faster between NAND-SR FF and NOR-SR FF?
Ans-well both deals with same principle.but i think NAND-SR FF is faster than NOR-SR FF

54.    Cost of storing a bit is minimum in
1. Cache 2. Register
3. RAM 4. Magnetic tape
Ans-Magnetic Tape

56.    How many characters per sec (7 bits + 1 parity ) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start and 1 stop bit)?
1. 300 2. 240
3. 250 4. 275
Ans- 2400/(7+1+2) 240


57.    What does CE mean..U will see it on almost every chip(IC)..
Ans-The CE mark is a mandatory European marking for certain product groups to indicate conformity with the essential health and safety requirements set out in European Directives. The letters 'CE' are an abbreviation of Conformité Européenne,
French for European conformity. The CE mark must be affixed to a product if it falls under the scope of the approx. 20 so called 'New Approach' Directives. Without the CE marking, and thus without complying with the provisions of the Directives, the product may not be placed in the market or put into service in the fifteen member states of the European Union and Norway, Iceland and Liechtenstein. However, if the product meets the provisions of the applicable European Directives, and the CE mark is affixed to a product, these countries may not prohibit, restrict or impede the placing in the market or putting into service of the product.
Thus, CE marking can be regarded as the products trade passport for Europe. The CE mark is not a quality-mark. First, it refers to the safety rather than to the quality of a product. Second, most quality markings are voluntary opposite to the CE marking, which is mandatory for the products it applies to. CE indicates conformity with mandatory European safety requirements. European conformity is certified by following clear and understandable procedures, the so-called ‘conformity assessment procedures’

58.    What is the difference between PLC and DCS?
Ans-PLC means Programmable Logic Controller, which can be used to control one particluar control system such as a boiler or a injection system.
but DCS is Distributed control syetem, which is used to monitor and control the total process plant. in DCS we have no of controllers connected to a single monitoring system.

59.    why the feeding frequency to a microprocessor  s twice the operating frequency.
Ans-since 8085 microprocessor operating frequency 5 mega hz but operating frequency is 10 mega hz because crystal effect in processor

60.    Do we have any negative frequency?
Ans-no it can't be negative because freguency is simply the reciprocal of time and time can't be negative.
We use negative frequencies in our calculations just for easieness but remember at last we neglect it also
61.    what is angle and amplitude modulation? what is noise in modulation?
Ans- modulation means change. to send a message of low frequency to a far distance we use a carrier of high frequency to carry the message. while transfering we change some parameters of carriers for faithful tranformation of message signal. if the amplitude of the carrier is varied in accordance with frequency of message signal then it is called amplitude modulation. if either phase or frequency is changed in accordance with the frequency of message signal then it is called angle modulation.
noise is an unwanted signal which enter in signal while transfering a signal and makes the signal distorted.

62.    what is selective flooding?
Ans- Selective Flooding is a method to compute the Qos of the system

63.    what is fixed bias with and without decoupling capacitor
Ans- with ta decoupling capacitor u cannt get o/p bcz it blocks the DC and allows only AC ok.... is u dont us it it give the o/p but it's DC only so no use to hav a DC voltage in O/P

64.    what is the main application of scr in electronic field as well as in software field?
Ans- SCR is a rectifier we use this in power handling applications .
By varying on time and off time of the scr i.e by giving the pulse to its gate we can vary the average output power from the main power supply to the required device .
software part
we can use microcontroller and write a programme so that to generate required pulses to control the SCR.

65.    What is Biasing?
Ans- Biasing is process of applying potential across any electronic equipment in order to make it operate as we require.
  
 Some more questions

1. How do you make a memory card of mobile phone?
A memory chip stores bits and mounted in a card with electrical contacts so a computer or camera can send data to be stored. There is not much more to it than that.

2. Why do I not see the battery and capacitor combination for power backup?
There are "super capacitors" that are used for power backup - they are efficient for short-term power take-over, but they are leaky and are not good for long term. Batteries tend to die slowly, more slowly than the leakage on a power backup capacitor, so the capacitor does not do any good. Regular capacitors store so little energy they cannot really be a power source.

3. When recording infrasound waves or microwaves how do they differ from one another? What is the best way to read them?
By microwaves, do you mean radio signals, like in a microwave oven? These have nothing to do with sound. There is no way to "record" microwaves really.
Sure, you can build a microwave transmitter with lots of power, enough to cook everyone in a building if you wanted to. The military has a microwave gun that heats up your skin painfully at a good distance (of course, all you do is wear aluminum foil and it does not affect you at all).

4. How can we prove that radio waves are sine waves? What makes them sine?
Fourier says that only a sine wave has no harmonic content. The math works out that if you have any wave shape other than a sign wave, you can break it down into a group of sine waves of different harmonic frequency, phase, and amplitude. All those harmonics go to zero when the wave shape is a pure sine. We can tell that radio waves behave like a sine, you can run them through a narrowband filter, and no energy is lost. Maxwell's equations predict propagation and fields based on a sine wave, and anything other than that propagates as if it is multiple frequencies, which do not propagate energy as well. So mathematically, radio waves work as they measure to work only if you assume they are sine waves.

5. Is it possible to reverse the order of a Variable Frequency Drive? Ex: I want to be able to create 120v power from a variable speed engine, with at least 6kw of power.
You say many alternators, but really, you need only one. The more I think about this, the more I think it is not so hard to do. If you have a 6KW alternator, it's possible that it has some kind of voltage regulation, maybe the rotor is not a permanent magnet, but an electromagnet with ring brushes, and there's a regulator circuit that drives this to keep the voltage constant regardless of frequency. If this is the case, what I would do (not many would try this) is rectify this to make 150 volts DC with a simple rectifier bridge and filter cap (total maybe $30). Then buy some 1KW inverters, and tap into them after the DC-DC converter (the part where it takes in 12VDC and steps it up to 150 VDC), drive the 150VDC in at that point, then let it switch this to AC for you. You could put 6 of these all running from the same alternator, so you could run 6 1KW loads.
Now taking this idea a step further, I would realize that the DC-DC converter is most of what you are paying for in the inverter, and it is the source of inefficiency in the inverter. So you are wasting a lot of money and watts, and so I would copy the circuit out of it that does the switching (4 power FETs and a 60 cycle driver) and have my inverter done much cheaper.

6. Why does charging batteries take lengthy periods? What can be done to quicken the speed?
Batteries work through a chemical process, some kind of ion exchange where the battery contains two elements that want to combine ions and give up an electron to cause current flow. They do this energy release all by themselves with no energy added, it wants this exchange to happen it is more stable after the reaction. Therefore, to charge the battery you are forcing things to go backwards, which the reaction does not like. By adding a current, you are making the reaction reverse. This is not an efficient process, and usually takes more energy than is given back, like more than twice as much takes (depends on the battery type). Where does the extra energy go? It is into heat mostly.
Therefore, the problem with fast charging is you cannot put so much energy back that you get the battery too hot and melt it down. You can charge a battery at a much higher rate than you discharge it, so you can make the charge cycle take less time than the discharge (this depends on the discharge rate as well, of course). However, you are limited by the heat, so a 1-minute charge of your electric car just is not possible.

7. What do mean by "flow of electron"?
Flow of electrons is just what it says - electrons flow down a wire that is what current, is. Good conductors like copper and silver and aluminum have free electrons in their outer shells, and they jump from atom to atom down a wire. It is somewhat similar to water flowing down a pipe.
It's kind of amazing that you can force this to happen with a battery or a magnet, and that you can transfer energy this way, but that's what it does.

8. What are encoder and the decoder? What are the uses of these two devices? Also, write about how it works with circuit diagram.
There are zillions of things in electronics called encoders. You can look up LCDs and NAND gates as well and this is really basics.

9. Do you have any ideas how to make a ping-pong ball launcher that reloads automatic and shoots automatically?
Air cannon is probably the simplest, PVC pipe from Home Depot and shoots things very far, can make any size you want, need a tire pump or air compressor to power it. It is also called Potato Cannons for obvious reasons. I shot a potato over 1000 feet with 60 psi and 2" pipe.

10. Is it possible to build an AC or DC variable-speed generator with a variable field current, controlled by a signal from a torque sensor connected to the shaft of the generator (i.e., net torque = 0)?
You can control the field with anything, but why would you do it with torque? Why do you say net torque=0? What is the significance of variable speed?
I am trying to think of why you would do this. If the torque were low, you could increase the field to generate more energy, which would make the torque go up. That is positive feedback, but maybe it is constant power into a resistive load (voltage would go up). If you did negative feedback, that would mean the field would reduce as the torque went up, reducing the torque, so you would have a torque regulator. This would probably be good for a wind generator, as you want to control the torque to match the wind speed to get maximum energy out, but this would also vary the output of the generator a lot. Maybe if you were heating water this would work.

11. What is the significance of "4-20 mA" signal in hart protocol?
The HART protocol is an old Frequency Shift Keying way of sending data, typically from highway sensors. This is a very old standard by today's standards there are so much better ways to send data. Of course, 4-20 ma loops are even older, dating back over 50 years, and still in common use. Must be something good about it - it is simple.
4-20 ma loops are a way to send an analog value, like temperature or position, over a pair of wires. It is simple on the surface, 4 mA is the minimum, and 20 mA is the maximum of the range. The cool thing about this is that it is constant current, not a voltage, so line resistance does not matter. Anything, constant current looks like an open circuit, so it is supposedly immune to noise (though in reality it still has noise pickup problems). However, why not 0 to 20 mA the cool thing is you can power the remote sensor. You are running a current through the remote you have a voltage at the driving end why not use some of that power to run the electronics in the sensor? Therefore, if the sensor pulls less than 4 ma and you make the range 4-20, you always have enough current to power the remote at the same time.

12. The current through a resistor of 50 Ω in an AC circuit at t = 0.008 s is 65% of the peak value. The smallest possible frequency of the generator delivering the current is
If it is then this is easy, you take the arcsine of 65% that gives you what angle you are at in the sine cycle, take the ratio of that to 360, and multiply that by 8mS to get the time of a full cycle, and then take one over that to get frequency. This will be the lowest frequency. Note that the 50 ohms has nothing to do with it, other than implying it is an RF circuit where 50 ohms is common. You say "smallest possible frequency" which also is not very clear I will assume you mean lowest frequency. There is no highest frequency you can meet this requirement with an arbitrarily high frequency.

13. What is the difference between Photodiode and Solar cell?
A photodiode is made to detect light quickly a solar cell is made to collect energy from light. They are both typically silicon diodes, but modified to meet their different requirements. A photodiode has to be fast, which means low capacitance, which means small area of silicon. Therefore, it is not very sensitive, and cannot generate much power from light. A solar cell has as large an area as you can afford to buy, getting watts per square inch. There are other differences in the way they are made, and how the PN junction is grown, but they all relate to this difference in purpose.

14. Can you explain electricity at atom level and if possible show some diagrams please
If you look at the classic Bohr model of the atom (from 1913), you have electrons orbiting around a nucleus of protons and neutrons. Normally there are as many electrons (negative charge) as protons (positive charge), so the net charge of the atom is zero. The various shells or orbit radii of the model have different characteristics as to how many electrons they are happy having orbiting in them. The first shell likes 2 max, the 2, and 6, etc. If there is one less electron that what the outermost used shell considers full, it will happily take on another electron, even if this unbalances the charge. If it has just one electron in a shell, it would happily give it up even if it unbalances the charge. Copper, one of the best conductors of electricity, has 29 electrons, which means in its 4th orbit, it has one electron. It is easily taken away by something pulling on it. In fact, if you put a bunch of copper atoms together, there is a cloud of electron sharing with that one electron moving from atom to atom, and others taking its place.
Electricity is current flow, and current flow is the movement of electrons. In a copper wire, if you push the electrons with some electro-motive force, they will flow and make a current. A battery has chemicals in it that push electrons with a chemical reaction. A generator pushes electrons with a magnetic field. A solar cell pushes electrons when photons hit a certain material and knock electrons off. If you push electrons through something that does not want to give up its electrons, it will resist and give off heat or light when electron flow is forced upon it. This all gets very complicated in the details, but it explains heaters, LEDs, and incandescent lights, etc. A moving electron flow creates a magnetic field, which explains motors and electromagnets. Energy is therefore passed by moving electrons through a wire, a very convenient effect for the world.

15. How can the electromagnetic can travel in air and not lose any information contained in them?
There is a limit to how far you can get television signals. The power is spreading out the farther you are away from the source. At some distance, you reach a point where the noise in the atmosphere becomes greater than the signal, and you can no longer extract all the information from the signal. Digital television has much error correction, many bits are sent just so corrections can be made when there are errors. This helps on the fringe, but even this fails when the signal gets weak enough. However, error correction makes the signal perfect until you hit that exact point where the correction fails. Thus, digital TV has a sharp cutoff point - you get a perfect picture, or it goes away completely. Therefore, electromagnetic waves do lose information. Think of someone aiming a flashlight at you. The person walks further and further away from you. At some point, you are just not going to be able to tell. What if there were fogs or lots of pollution in the air? Alternatively, 20 other flashlights and you had to pick out just the one. It is easy and 100% when they are close.

16. How is the transmission of a signal in a computer over x number of clock cycles translated into binary?
All computer logic today uses FETs as switches. A FET is a switch with gain, meaning that a small signal change on its input (the Gate) causes a bigger signal in the Drain. Bigger does not mean bigger voltage, it usually means more current at the same voltage, so it can drive many other inputs after it. Two FETs can be connected together to make a logic gate, like an AND function. In addition, gates can be connected together to make flip-flops and counters and adders, etc.
Logic "1" is usually a higher voltage than logic "0", and logic 0 is usually zero volts. In newer processors, the high voltage is less than a volt, since the FETs are so small that 1.5V will blow them up.
Therefore, it is not the presence of a signal or the lack of one; it is a high voltage and a low voltage. There is nothing that the computer translates, that voltage is it, throughout the computer. That is what binary means, one of two voltages. There is no clock involved to make something binary all signals in the computer are all binary logic with a voltage. Even a clock is just a logic signal that goes between 1 and 0 at a periodic rate.

17. Can we calculate the resistor if it is installed in circuit board?
You can measure a resistor in a circuit but the circuit will most likely affect the value read (usually making it look lower in resistance). A simple example would be if there were two resistors in parallel in the circuit. If you measure one, you will get the resistance of the two in parallel, and maybe other effects of the rest of the circuit.
Most resistors have markings on them, and they rarely fail unless they are cooked by too much power. That is the easy way. If they are not marked, you want to know the value, and it is in a circuit, then it is hard to figure out the value. It might be easier to unsolder one end of it and then measure it.
Digital electronics
1.            Flip flop and their working. What is metastable state in flip-flops?
2.            Construct a d flip-flop from a t flip-flop.Differentiate b/w flip-flop and latches
3.            What is totem pole?
4.            Draw the state graphs for a given problem like sequence generator, flip flop etc
5.            Implement Boolean expressions using MUX (2 to 4,3 to 8,etc)
6.            Design a decade counter
7.            Explain internal organization of memory chips
8.            What is a bit? What is CMOS? Draw the circuit of an adder using NAND gate
9.            What is a Karnaugh map?
10.         What are the four methods to reduce a Boolean?
11.         What is the difference b/w half adder and full adder?
12.         What are the advantages of CMOS and TTL?What technology is used in CMOS logic?What are VLSI and ULSI? What is the number of components in both?
13.         Explain synchronous and asynchronous counter
14.         Minimize the function using Quine McClusky:f=xy+x’y+yz+x’y’z’
15.         What is prime implicant? Which is the universal flip-flop?
16.         What is SRAM and DRAM? Compare the two, relative cost of the two.
17.         What will happen in the case of a power failure for the above?
18.         What is tristate or high impedance state?
19.         What are the difference between open collector output and totem pole out put?
20.         Find the highest clocking frequency of a digital circuit give the rise time ,fall time and propagation delay?
Electronic Devices & circuits
1.            Obtain a square wave from sine wave from Zener diodes.
2.            What is the difference between oscillator and multivibrator?
3.            What is emitter follower? What is an opamp?
4.            What is the ideal gain of an opamp?
5.            How is amplification possible in a transistor?
6.            Classify power amplifiers
7.            How does a diode look(internally)? Explain the working using internal diagram
8.            Explain processes taking place in the depletion junction of a forward biased diode
9.            What is a buffer? What is the gain of a buffer?
10.         What is an oscillator?
11.         How do you forward bias a transistor?
12.         What are the practical applications of a transistor?
13.         What is reverse recovery time and how does it affect a diode?
14.         Draw and explain the working of a monostable vibrator using op amp
15.         State Thevenin’s theorem and Norton’s theorem. What are their applications?
16.         What is the virtual ground in an op amp?
17.         Differentiate between intrinsic and extrinsic semiconductor
Power Electronics
1.            What is a thyristor and differentiate between thyristor and a diode
2.            Switching action of an SCR and triggering. Draw the diagram of thyristor
3.            Draw an internal block diagram of a normal voltage stabilizer
4.            What is a reference variable?
Control Systems
1.            Define control systems. Why are they so important?
2.            What are the different types of control systems?
3.            Explain open loop with block diagram examples
4.            What are the advantages and drawbacks of closed loop?
5.            How can you design a stable system? Explain different stability criteria
6.            Explain Ruth-Hurwitz rule in one sentence. What are poles and their significance?
7.            Is there any control system in this room(interview hall)?
8.            Draw the block diagram of a control system and write its transfer function
9.            What is ROC? Explain transformation between s and z planes
10.         Differentiate between open and closed loop control systems
11.         What is meant by adaptive control system?
12.         Find the transfer function of a given RLC circuit
Communication
1.            What is packet switching and circuit switching? What is the protocol used in telephone network?
2.            What is modulation? Why is needed? What are the various types?Compare AM,FM, PM.Which waves will travel a longer distance- FM or AM and why?
3.            What is the mode of transmission of television signals?
4.            Compare the bandwidth requirements of AM and FM
5.            What do you know about antennae?
6.            Why is linking up frequency greater than the down linking frequency?
Modern trends and general questions
1.            What is a modem? Draw its internal diagram
2.            What is VoIP?
3.            What is the most important advantage of Bluetooth?
4.            What is wave studio? What is Bit rate?
5.            What is the difference between mp3 and WAV formats?
6.            What is sampling? What is a database? What is VHDL? What is a complier?
7.            What is FSF? Cite any current relevance
8.            Volume control in TV is logarithmic. Why?
9.            What is the mathematics used in DSP and from which domain to which domain is it converted?
10.         Differentiate between macros and functions in C .Explain the booting process of a computer.What is round robin technique of interrupt arbitration