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Wipro Electronics Technical Interview Placement Paper

1. An electron moving in an electromagnetic field moves in a

(a) In a straight path
(b) Along the same plane in the direction of its propagation
(c) Opposite to the original direction of propagation
(d) In a sine wave
Ans. (b)

2. The total work done on the particle is equal to the change in its kinetic energy
(a) Always
(b) Only if the forces acting on the body are conservative.
(c) Only if the forces acting on the body are gravitational.
(d) Only if the forces acting on the body are elastic.
Ans. (a)

3. The following unit measure energy:

(a) Kilo-watt hour.
(b) Volt*volt/sec*ohm.
(c) Pascal*foot*foot
(d) (Coulomb*coulomb)*farad
Ans. (a)

4. Astronauts in stable orbits around the earth are in a state of weightlessness

(a) There is no gravitational force acting on them.
(b) The satellite and the air inside it have an acceleration equal to that of gravitational
acceleration there.
(c) The gravitational force of the earth and the sun balance giving null resultant.
(d) There is no atmosphere at the height at which the satellites move.
Ans. (b)

5. An organ pipe, open at both ends and another organ pipe closed at one end, will resonate
with each other, if their lengths are in the ratio of
(a) 1:1
(b) 1:4
(c) 2:1
(d) 1:2
Ans. (c)

6. During an isothermal expansion of an ideal gas

(a) Its internal energy increases.
(b) Its internal energy decreases.
(c) Its internal energy does not change.
(d) The work done by the gas is not equal to the quantity of heat absorbed by it.
Ans. (c)

7. A parallel plate capacitor is charged and the charging battery is then disconnected.
If the plates of the capacitor are moved further apart by means of insulating handles
(a) The charge on the capacitor increases.
(b) The voltage across the plates increases.
(c) The capacitance increases.
(d) The electrostatic energy stored in the capacitor decreases.
Ans. (b)

8. Two equal negative charges q are fixed at point (0,a) and (0,-a) on the y-axis.
A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will
(a) Execute simple harmonic motion about the origin
(b) Move to the origin and remain at rest
(c) Move to infinity
(d) Execute oscillatory but not simple harmonic motion
Ans. (d)

9. A square conducting loop of length Lon a side carries a current I.

The magnetic field at the center of the loop is
(a) Independant of L
(b) Proportional to L*L
(c) Inversely proportoinal to L
(d) Directly proportional to L
Ans. (c)

10. The focal length of a convex lens when placed in air and then in water will
(a) Increase in water with respect to air
(b) Increase in air with respect to water
(c) Decrease in water with respect to. air
(d) Remain the same
Ans. (a)

11. The maximum kinetic energy of the photoelectron emitted from the surface is dependant
(a) The intensity of incident radiation
(b) The potential of the collector electrode
(c) The frequency of incident radiation
(d) The angle of incidence of radiation of the surface
Ans. (c)

12. An electron orbiting in a circular orbit around the nucleus of the atom
(a) Has a magnetic dipole moment
(b) Exerts an electric force on the nucleus equal to that on it by the nucleus
(c) Does not produce a magnetic induction at the nucleus
(d) All of the above
Ans. (d)

13. The X-rays beam coming from an X-ray tube will be:
(a) Monochromatic
(b) Having all wavelengths smaller than a certain minimum wavelength
(c) Having all wavelengths larger than a certain minimum wavelength
(d) Having all wavelengths lying between a minimum and a maximum wavelength
Ans. (c)

14. The mass number of a nucleus is

(a) Always less than its atomic number
(b) Always more than its atomic number
(c) Always equal to its atomic number
(d) Sometimes more and sometimes equal to its atomic number
Ans. (d)

15. Two successive elements belonging to the first transition series have the same number
of electrons partially filling orbital. They are
(a) V and Cr
(b) Ti and V
(c) Mn and Cr
(d) Fe and Co
Ans. (c)

(a) n is maximum
(b) n is minimum
(c) l is maximum
(d) l is minimum
Ans. (b)

17. A balloon filled with ethylene is pricked with a sharp pointed needle and quickly placed in
a tank full of hydrogen at the same pressure. After a while the balloon would have
(a) Shrunk
(b) Enlarged
(c) Completely collapsed
(d) Remain unchanged in size
Ans. (b)

18. Which of the following statements is not true?

(a) The ratio of the mean speed to the rms speed is independent of temperature
(b) Tthe square of the mean speed of the molecules is equal to the mean squared speed at a
certain temperature
(c) Mean kinetic energy of the gas molecules at any given temperature is independent of the
mean speed
(d) None
Ans. (b)

19. Which of the following statements represent Raoult’s Law

(a) Mole fraction of solvent = ratio of vapour pressure of the solution to vapour pressure of
the solvent
(b) Mole fraction of solute = ratio of vapour pressure of the solution to vapour pressure of the
(c) Mole fraction of solute = lowering of vapour pressure of the solution
(d) Mole fraction of solvent = lowering of vapour pressure of the solution
Ans. (a)

20. Elements having the same atomic number and the same atomic mass are known as
(a) Isotopes
(b) Isotones
(c) Isomers
(d) None of the above

21.Which is the most acidic amongst

(a) Nitrophenol
(b) O-toulene
(c) Phenol
(d) Cresol

22. Pure water does not conduct electricity because it is

(a) Almost not ionised
(b) Low boiling
(c) Neutral
(d) Readily decomposed
Ans. (a)

23. In a salt bridge, KCl is used because

(a) It is an electrolyte
(b) The transference number of K+ and Cl¯ is nearly the same
(c) It is a good conductor of electricity
(d) All of the above
Ans. (d)

24. A depolarizer used in the dry cell batteries is

(a) KCl
(b) MnO2
(c) KOH
(d) None of the above
Ans. (b)

25. The hydrolysis of alkyl halides by aqueous NaOH is best termed as

(a) Electrophylic substitution reaction
(b) Electrophylic addition reaction
(c) Nnucleophylic addition reaction
(d) Nucleophylic substitution reaction
Ans. (d)

26. The hydrocarbon that gives a red precipitate with ammoniacal cuprous chloride is (where
‘º’ means a triple bond)
(a) CH3-CH2-CH2-CH3
(b) CH3-CºC-CH3
(c) CH2=CH-CH=CH2
(d) CH3-CH2-CºCH
Ans. (d)

27. Which of the following reagents is neither neutral nor basic

(a) Lucas’ reagent
(b) Tollen’s reagent
(c) Bayer’s reagent
(d) Fehling’s solution
Ans. (a)

28. The substance which is most easily nitrated

(a) Toluene
(b) Bbenzene
(c) Nitrobenzene
(d) Chlorobenzene
Ans. (a)

29. Carbylamine reaction is a test for

(a) Primary amine
(b) Secondary amine
(c) Tertiary amine
(d) Quarternary ammonium salt
Ans. (a)

30. Which of the following oxides cannot be reduced by carbon to obtain metal
(a) ZnO
(b) Al2O3
(c) Fe2O3
(d) PbO
Ans. (b)

31. Which of the following is not an oxide ore?

(a) Cassiterite
(b) Siderite
(c) Pyrolusite
(d) Bauxite
Ans. (b)

32. Which among the following is called philosopher’s wool

(a) Cellulose
(b) Calamine
(c) Stellite
(d) Cerussite
Ans. (c)

33. Out of 10 white, 9 black and 7 red balls, in how many ways can we select one or more
(a) 234
(b) 52
(c) 630
(d) 879
Ans. (d)

34. A and B throw a dice. The probability that A’s throw is not greater than B’s is
(a) 5/12
(b) 7/12
(c) 11/12
(d) 5/36
Ans. (b)

35. Given two numbers a and b. Let A denote the single AM between these and S denote the
sum of n AMs between them. Then S/A depends upon
(a) n
(b) n,a
(c) n,b
(d) n,a,b
Ans. (a)

36. If the sum of the roots of the equation ax²+bx+c=0 is equal to the sum of the squares of
their reciprocals, then, a/c, b/a, c/b are in
(a) AP
(b) GP
(c) HP
(d) None of the these
Ans. (c)
In the following questions ~ represents the integral sign-for eg. 1~2[f(x)] means integration
of the function f(x) over the interval 1 to2.

37. Value of -1~2[|2-x²|]dx, ie integration of the function |2-x²| over the interval -1 to 2.
(a) 0
(b) 1
(c) 2
(d) None of the above
Ans. (d)

38. If 0~P[log sinx]dx=k,then the value of 0~P/4[log(1 + tan x)]dx ,where P stands for pi,is
(a) -k/4
(b) k/4
(c) -k/8
(d) k/8
Ans. (c)

39. If a,b,c be in GP and p,q be respectively AM between a, b and b, c then

(a) 2/b=1/p+1/q
(b) 2/b=1/p-1/q
(c) 2=a/p-c/q
(d) None of the above
Ans. (a)

40. A solution of KMnO4 is reduced to MnO2 .The normality of solution is 0.6.The molarity is
(a) 1.8M
(b) 0.6M
(c) 0.1M
(d) 0.2M
Ans. (d)
The questions 41-46 are based on the following pattern. The problems below contain a
(D) If both together are not sufficient.
41. What is John’s age?
(II) Dias was born 5 years ago
Ans. (C)

42. What is the distance from city A to city C in kms?

(I) City A is 90 kms from City B
(II) City B is 30 kms from City C
Ans. (D)
43.Is A=C ? A,B,C are real numbers
(I) A-B=B-C
(II) A-2C = C-2B
Ans. (C)

44. What is the 30th term of a given sequence ?

(II) The common difference is -1/2
Ans. (A)
45.Was Avinash early, on time or late for work?
(I) He thought his watch was 10 minutes fast
(II) Actually his watch was 5 minutes slow
Ans. (D)

46. What is the value of A if A is an integer?

(I) A4 = 1
(II) A3 + 1 = 0
Ans. (B)

from his starting place?
(a) 5.5 kms
(b) 3 km
(c) 13 km
(d) 6.4 km
Ans. (b)

48. X’s father’s wife’s father’s granddaughter uncle will be related to X as

(a) Son
(b) Nephew
(c) Uncle
(d) Grandfather
Ans. (c)

(a) 43
(b) 33
(c) 41
(d) 45
Ans. (a)

the code for the word “MANGO” would be
(a) 82357
(b) 89343
(c) 84629
(d) 82347
Ans. (d)

51. If “PROMPT” is coded as QSPLOS ,then “PLAYER” should be

Ans. (a)
The questions 52-53 are based on the following data 6 people A, B, C, D, E and F sit around a
table for dinner. Since A does not like C, he doesn’t sit either opposite or beside C.B and F
always like to sit opposite each other.

52. If A is beside F then who is are the two neighbors of B?

(a) D and C
(b) E and C
(c) D and E
(d) Either (a) or (b)
Ans. (c)
53. If D is adjacent to F then who is adjacent to C?
(a) E and B
(b) D and A
(c) D and B
(d) either (a) or (c)
Ans. (d)

54. Complete the sequence A, E ,I ,M ,Q ,U , _ , _

(a) B, F
(b) Y, C
(c) G, I
(d) K, O
Ans. (b)

(a) 13km east
(b) 13km northeast
(c) 13km northwest
(d) 13km west
Ans. (c)

probability that they tell the truth at the same time
(a) 0.8
(b) 0.48
(c) 0.6
(d) 0.14

57. If the time quantum is too large, Round Robin scheduling degenerates to
(a) Shortest Job First Scheduling
(b) Multilevel Queue Scheduling
(c) FCFS
(d) None of the above

Ans. (c)

58. Transponders are used for which of the following purposes

(a) Uplinking
(b) Downlinking
(c) Both (a) and (b)
(d) None of the above

Ans. (c)

59. The format specifier “-%d” is used for which purpose in C

(a) Left justifying a string
(b) Right justifying a string
(c) Removing a string from the console
Ans. (a)

60. Virtual functions allow you to

(a) Create an array of type pointer-to-base-class that can hold pointers to derived classes
(b) Create functions that have no body
(c) Group objects of different classes so they can all be accessed by the same function code
(d) Use the same function call to execute member functions to objects from different classes

62. A sorting algorithm which can prove to be a best time algorithm in one case
and a worst time algorithm in worst case is
(a) Quick Sort
(b) Heap Sort
(c) Merge Sort
(d) Insert Sort
Ans. (a)

(a) Details
(b) Coding
(c) Decisions
(d) None of the above
Ans. (c)

64. In an absolute loading scheme, which loader function is accomplished by assembler

(a) Reallocation
(b) Allocation
(c) Linking
(d) Both (a) and (b)
Ans. (d)

65. Banker’s algorithm for resource allocation deals with

(a) Deadlock prevention
(b) Deadlock avoidance
(c) Deadlock recovery
(d) None of these
Ans. (b)

66. Thrashing can be avoided if

(b) The speed of CPU is increased
(c) The speed of I/O processor are increased
(d) All of the above
Ans. (a)

67. Which of the following communications lines is best suited to interactive processing
(a) Narrowband channels
(b) Simplex channels
(c) Full-duplex channels
(d) Mixedband channels
Ans. (b)

68. A feasibility document should contain all of the following except

(a) Project name
(b) Problem descriptions
(c) Feasible alternative
(d) Data flow diagrams
Ans. (d)

69. What is the main function of a data link content monitor?

(a) To detect problems in protocols
(d) To determine the flow of data
Ans. (a)

70. Which of the following is a broadband communications channel?

(a) Coaxial cable
(b) Fiber optic cable
(c) Microwave circuits
(d) All of the above
Ans. (d)

71. Which of the following memories has the shortest access time?
(a) Cache memory
(b) Magnetic bubble memory
(c) Magnetic core memory
(d) RAM
Ans. (a)

72. A shift register can be used for

(a) Parallel to serial conversion
(b) Serial to parallel conversion
(c) Digital delay line
(d) All the above
Ans. (d)

73. In which of the following page replacement policies, Balady’s anomaly occurs?
(a) FIFO
(b) LRU
(c) LFU
(d) NRU
Ans. (a)

74. Subschema can be used to

(a) Create very different, personalized views of the same data
(b) Present information in different formats
(c) Hide sensitive information by omitting fields from the sub-schema’s description
(d) All of the above

Ans. (d)
Wipro Paper (Verbal Section)
It consists of 3 rounds.
1. Written test
2. Technical interview
3. HR interview.

Written test: It consists of 50Q and the duration is 1 hr.

15Q from verbal

( Topics: active voice & passive voice, reported speech, phrases, one word substitute,
synonym, jumbled word, Reading Comprehension)
15Q from aptitude
(Topics: Blood relations, number series, conclusion from the paragraph, time& work, time
distance, theme of the paragraph, boats & streams, avg, clocks, directions)
20Q from technical
( Ttopics: C (3), DS(3), general(2), DBMS, OS, unix, networks)

Verbal section:

1. convert the following sentence into indirect speech She said, ?I lived here for
many years?.
Ans: She said that she had been living there for many years.

2. convert the following sentence into passive voice Will the postman post the
Ans: Will the letters be posted by the postman.

3. what is the meaning of the phrase ? Stuck between the two guns?
Ans: firm with the attitude and don?t bent your attitude.

4. In the following options what is the best phrase which replaces the underlind
phrase in the given sentence. Children must have to be take care while crossing the
A) should have to be
B) must be
C) have to be
D) should be

5. What we call the person who ? chatter continuously and unintelligently?

(Ans: Jabber)

6. In a sentence the word known as stumbling is underlined and asked what is

similar word (lurching)

7. A jumbled word known as L O R F S H U I If the word is arranged in correct 1 2 3 4

5 6 7 8 order then what will be the order of number ( Flourish ? 4 1 2 7 3 8 5 6).

8. Question about Punctuation mark.

One RC was given on the topic of extra terrestrial life ( 5Q).( It will become easy if u go
through the ques) Wipro (Aptitude Section)

Aptitude Section:

1. There is a family of six persons P,Q,R,S,T and U.They are Lawyer, Doctor,
Teacher, Salesman,Engineer and Accountant. There are two married couples in the
family. S, the salesman is married to the Lady Teacher. The Doctor is married to the
Lawyer U, The Accountant is the son of Q and brother of T. R, the Lawyer is the
daughter-in-law of P. T is the unmarried Engineer. P is the Grandmother of U. Which
is the profession of P?
a) Lawyer
b) Teacher
c) Doctor
d )Accountant

3. There are 6 volumes of books on a rack kept in order(i.e vol.1, vol.2 and so on).
vol.5 was directly to the right of vol.2.
vol.4 has vol.6 to its left and both weren t at vol.3 s place.
vol.1 has vol.3 on right and vol.5 on left.
An even numbered volume is at vol.5 s place.
Find the order in which the books are kept now.
a) 2,5,1,3,6,4
b) 4,1,3,6,5,2
c) 5,4,6,3,1,2
d) 3,5,4,2,6,1

4.Examine carefully the following sequence of numbers:


Hint: ( in first row one 1, in 2nd row two 1s, in 3rd row one 1,???..

Although the sequence appear to behave totally at random, In fact , after the first
sequence, each sequence is constructed in a precise and methodical way based on
the previous one. What is the next sequence?


I) C is father of N but N is not son of C.
II) M is daughter of B and sister of P.
III) P is brother of N.

Which of the following is can not be inferred from the information given?
a) N is brother of P
b) B has three children
c) N is younger to P
d) B has

6. Divide 30 by half and add 10. what is the new number

A) 20
C) 70
D) 80

7. theme detection of a paragraph.( sorry I didn?t the remember the paragraph)

8. one problem on volumes

9. A wire of length 42c.m. is made into the form a rectangle such that the width
is double the length.Then what are the values of length and width respectively
( 7,14).

10. two trains are traveling from point A to point B such that the speed of first train
is 65kmph and the speed of 2nd train is 29kmph. What is the distance b/w A&B such
that the slower train reached 5hrs late compared to the faster train.

11. A motorboat whose speed is 15kmph in still water goes 30kmph downstream
and comes back in a total of 4hrs 30min. the speed of the stream in kmph
is (5kmph).

Technical Section

1. what is the most commonly used display device in monitors. (CRT).

2. main()
int i=6720,j=4;
while(i%j= =0)

What is the value of j at the end of the loop. (9);

3. What is the output of the program

4. # define Max( if (x<y), printf(?x is greater than y))else;

int x,y;
if (x<y)
printf( ? x is not greater than y?);
( Iam not sure about the Q, but the ans is compile time error);

5. 1Q on pointers like a[2][2] then how can u represent the valu of a[2][1] by using
pointers. ( *((a+2)+1) . Iam not sure about the ans).

6. what is wrong about stacks ( Ans is ? Stack is referred to as fifo?);

7. In worst case Quick sort becomes which sort (Bouble sort)

8. one Q on the conversion of infix to prefix expression like ((A-B)*(C+D))/(F-G)

Some Qs. On : -
Unix commands(3)
Memory mgt(2)

Verbal(7 to 9)
Aptitude( 8)

Technical Interview:

I got call from the interviewer at 8 P.M.. The technical interview was very cool and
friendly and he made me to feel free. But you must express your views confidently.

He never expect any technical skill from u . He just see your communication skills
and your confidence. And at the same time you must perfect with ur resume. He
definitely ask Q about ur resume only. You must perfect in one of ur favorite sub and
C. The Q I faced are as follows.

? What is the purpose of C

? What is pointer
? What is the difference b/w structure and union

? About my mini project and about my paper presentation

? What is DSP( my core subj) applications of DSP

? What are ASICs, EX of ASIC.

? Draw a flowchat of activities about what had you done from the morning of that

After completion of TI he will give u application form and told u to go to the HR.

HR Interview:

1. Can you explain about ur name.I talked 2min about my name

2. about my hobbies

3. Why should we hire u.