1. A hierarchical memory system that uses
cache memory has cache access time of 50 nano
seconds, main memory access time of 300 nano
seconds, 75% of memory requests are for
read, hit ratio of 0.8 for read access and
the write-through scheme is used. What will be
the average access time of the system both
for read and write requests ?
(A) 157.5 n.sec. (B) 110 n.sec.
(C) 75 n.sec. (D) 82.5 n.sec.
Answer:(A)
2. For switching from a CPU user mode to
the supervisor mode following type of interrupt is
most appropriate
(A) Internal interrupts (B) External interrupts
(C) Software interrupts (D) None of the above
Answer:(C)
3. In a dot matrix printer the time to print a
character is 6 m.sec., time to space in between
characters is 2 m.sec., and the number of
characters in a line are 200. The printing speed
of the dot matrix printer in characters per second
and the time to print a character line are
given by which of the following options ?
(A) 125 chars/second and 0.8 seconds
(B) 250 chars/second and 0.6 seconds
(C) 166 chars/second and 0.8 seconds
(D) 250 chars/second and 0.4 seconds
Answer:(A)
4. Match the following 8085 instructions with the flags :
List – I List – II
a. XCHG i. only carry flag is affected.
b. SUB ii. no flags are affected.
c. STC iii. all flags other than carry flag are affected.
d. DCR iv. all flags are affected.
Codes :
a b c d
(A) iv i iii ii
(B) iii ii i iv
(C) ii iii i iv
(D) ii iv i iii
Answer:(D)
5. How many times will the following loop
be executed ?
LXI B, 0007 H
LOP : DCX B
MOV A, B
ORA C
JNZ LOP
(A) 05 (B) 07
(C) 09 (D) 00
Answer:(B)
6. Specify the contents of the accumulator
and the status of the S, Z and CY flags when 8085
microprocessor performs addition of 87 H and 79 H.
(A) 11, 1, 1, 1 (B) 10, 0, 1, 0
(C) 01, 1, 0, 0 (D) 00, 0, 1, 1
Answer:(D)
7. Location transparency allows :
I. Users to treat the data as if it is
done at one location.
II. Programmers to treat the data as
if it is at one location.
III. Managers to treat the data as
if it is at one location.
Which one of the following is correct ?
(A) I, II and III (B) I and II only
(C) II and III only (D) II only
Answer:(A)
8. Which of the following is correct ?
I. Two phase locking is an optimistic protocol.
II. Two phase locking is pessimistic protocol
III. Time stamping is an optimistic protocol.
IV. Time stamping is pessimistic protocol.
(A) I and III (B) II and IV
(C) I and IV (D) II and III
Answer:(D)
9. __________ rules used to limit the volume of
log information that has to be handled and
processed in the event of system failure
involving the loss of volatile information.
(A) Write-ahead log (B) Check-pointing
(C) Log buffer (D) Thomas
Answer:(B)
10. Let R = ABCDE is a relational scheme
with functional dependency set F = {A → B, B → C,
AC → D}. The attribute closures of A and E are
(A) ABCD, φ (B) ABCD, E
(C) Φ, φ (D) ABC, E
Answer:(B)
11. Consider the following statements :
I. Re-construction operation used in mixed
fragmentation satisfies commutative rule.
II. Re-construction operation used in vertical
fragmentation satisfies commutative rule
Which of the following is correct ?
(A) I
(B) II
(C) Both are correct
(D) None of the statements are correct.
Answer:(D)
12. Which of the following is false ?
(A) Every binary relation is never be in BCNF.
(B) Every BCNF relation is in 3NF.
(C) 1 NF, 2 NF, 3 NF and BCNF are based
on functional dependencies.
(D) Multivalued Dependency (MVD) is
a special case of Join Dependency (JD).
Answer:(A)
13. Which of the following categories of languages
do not refer to animation languages ?
(A) Graphical languages (B) General-purpose languages
(C) Linear-list notations (D) None of the above
Answer:(D)
14. Match the following :
List – I List – II
a. Tablet, Joystick i. Continuous devices
b. Light Pen, Touch Screen ii. Direct devices
c. Locator, Keyboard iii. Logical devices
d. Data Globe, Sonic Pen iv. 3D interaction devices
Codes :
a b c d
(A) ii i iv iii
(B) i iv iii ii
(C) i ii iii iv
(D) iv iii ii i
Answer:(C)
15. A technique used to approximate halftones
without reducing spatial resolution is known as
_________.
(A) Halftoning (B) Dithering
(C) Error diffusion (D) None of the above
Answer:(B)
16. Consider a triangle represented by
A(0, 0), B(1, 1), C(5, 2). The triangle is
rotated by 45 degrees about a point
P(–1, –1). The co-ordinates of the new
triangle obtained after
rotation shall be _______
Answer:(A)
17. In Cyrus-Beck algorithm for line clipping the
value of t parameter is computed by the
relation :
Answer:(A)
18. Match the following :
a. Cavalier Projection i. The direction
of projection is chosen so
that there is no foreshortening of lines
perpendicular to the xy plane.
b. Cabinet Projection ii. The direction of
projection is chosen so
that lines perpendicular to the xy planes
are foreshortened by half their lengths.
c. Isometric Projection iii. The direction
of projection makes equal
angles with all of the principal axis.
d. Orthographic Projection
iv. Projections are characterized by the fact
that the direction of projection is
perpendicular to the view plane.
Codes :
a b c d
(A) i iii iv ii
(B) ii iii i iv
(C) iv ii iii i
(D) i ii iii iv
Answer:(D)
19. Consider the following statements S1, S2 and S3 :
S1 : In call-by-value, anything that is passed into a
function call is unchanged in the
caller’s scope when the function returns.
S2 : In call-by-reference, a function receives
implicit reference to a variable used as
argument.
S3 : In call-by-reference, caller is unable to see
the modified variable used as argument.
(A) S3 and S2 are true. (B) S3 and S1 are true.
(C) S2 and S1 are true. (D) S1, S2, S3 are true.
Answer:(C)
20. How many tokens will be generated
by the scanner for the following statement ?
x = x * (a + b) – 5;
(A) 12 (B) 11
(C) 10 (D) 07
Answer:(A)
21. Which of the following statements is not true ?
(A) MPI_Isend and MPI_Irecv are non-blocking
message passing routines of MPI.
(B) MPI_Issend and MPI_Ibsend are non-blocking
message passing routines of MPI.
(C) MPI_Send and MPI_Recv are non-blocking
message passing routines of MPI.
(D) MPI_Ssend and MPI_Bsend are blocking
message passing routines of MPI.
Answer:(C)
Answer:(D)
Answer:(D)
Answer:(D)
25. For n devices in a network, ________
number of duplex-mode links are required for a
mesh topology.
(A) n(n + 1) (B) n (n – 1)
(C) n(n + 1)/2 (D) n(n – 1)/2
Answer:(D)
26. How many characters per second
(7 bits + 1 parity) can be transmitted over a 3200 bps
line if the transfer is asynchronous ?
(Assuming 1 start bit and 1 stop bit)
(A) 300 (B) 320
(C) 360 (D) 400
Answer:(B)
27. Which of the following is not a field in TCP header ?
(A) Sequence number (B) Fragment offset
(C) Checksum (D) Window size
Answer:(B)
28. What is the propagation time if the distance
between the two points is 48,000 ?
metre/second in cable.
(A) 0.5 ms (B) 20 ms
(C) 50 ms (D) 200 ms
Answer:(D)
29. __________ is a bit-oriented protocol for
communication over point-to-point and
multipoint links.
(A) Stop-and-wait (B) HDLC
(C) Sliding window (D) Go-back-N
Answer:(B)
30. Which one of the following is true for
asymmetric-key cryptography ?
(A) Private key is kept by the receiver and public
key is announced to the public.
(B) Public key is kept by the receiver and private
key is announced to the public.
(C) Both private key and public key
are kept by the receiver.
(D) Both private key and public key
are announced to the public.
Answer:(A)
31. Any decision tree that sorts n elements has height
Answer:(C)
32. Match the following :
Codes :
a b c d
(A) iv ii i iii
(B) ii iv i iii
(C) iv ii iii i
(D) iii ii iv i
Answer:(C)
33. We can show that the clique problem is
NP-hard by proving that
(A) CLIQUE ≤ P 3-CNF_SAT
(B) CLIQUE ≤ P VERTEX_COVER
(C) CLIQUE ≤ P SUBSET_SUM
(D) None of the above
Answer:(D)
34. Dijkstra algorithm, which solves the
single-source shortest--paths problem, is a
_________, and the Floyd-Warshall algorithm,
which finds shortest paths between all
pairs of vertices, is a _________
(A) Greedy algorithm, Divide-conquer algorithm
(B) Divide-conquer algorithm, Greedy algorithm
(C) Greedy algorithm, Dynamic programming algorithm
(D) Dynamic programming algorithm, Greedy algorithm
Answer:(C)
(A) 5 (B) 10
(C) 20 (D) 100
Answer:(B)
36. Suppose that we have numbers between 1
and 1000 in a binary search tree and we want to
search for the number 365. Which of the following
sequences could not be the sequence of
nodes examined ?
(A) 4, 254, 403, 400, 332, 346, 399, 365
(B) 926, 222, 913, 246, 900, 260, 364, 365
(C) 927, 204,913, 242, 914, 247, 365
(D) 4, 401, 389, 221, 268, 384, 383, 280, 365
Answer:(C)
37. Which methods are utilized to control the
access to an object in multi-threaded
programming ?
(A) Asynchronized methods
(B) Synchronized methods
(C) Serialized methods
(D) None of the above
Answer:(B)
38. How to express that some person keeps
animals as pets ?
Answer:(A)
39. Converting a primitive type data into its
corresponding wrapper class object instance is
called
(A) Boxing (B) Wrapping
(C) Instantiation (D) Autoboxing
Answer:(D)
40. The behaviour of the document elements
in XML can be defined by
(A) Using document object
(B) Registering appropriate event handlers
(C) Using element object
(D) All of the above
Answer:(B)
41. What is true about UML stereotypes ?
(A) Stereotype is used for extending the UML language.
(B) Stereotyped class must be abstract
(C) The stereotype indicates that the UML
element cannot be changed
(D) UML profiles can be stereotyped for backward
compatibility
Answer:(A)
42. Which method is called first by an applet program ?
(A) start( ) (B) run( )
(C) init( ) (D) begin( )
Answer:(C)
43. Which one of the following is not a
source code metric ?
(A) Halstead metric (B) Function point metric
(C) Complexity metric (D) Length metric
Answer:(B)
44. To compute function points (FP),
the following relationship is used FP
(i = 1 to n) are value adjustment
factors (VAF) based on n questions.
The value of n is
(A) 12 (B) 14
(C) 16 (D) 18
Answer:(B)
45. Assume that the software team defines a project
risk with 80% probability of occurrence
of risk in the following manner :
Only 70 percent of the software components
scheduled for reuse will be integrated into the
application and the remaining functionality will
have to be custom developed. If 60
reusable components were planned with
average component size as 100 LOC and
software engineering cost for each LOC as $
14, then the risk exposure would be
(A) $ 25,200 (B) $ 20,160
(C) $ 17,640 (D) $ 15,120
Answer:(B)
46. Maximum possible value of reliability is
(A) 100 (B) 10
(C) 1 (D) 0
Answer:(C)
47. ‘FAN IN’ of a component A is defined as
(A) Count of the number of components that can
call, or pass control, to a component A
(B) Number of components related to component A
(C) Number of components dependent on component A
(D) None of the above
Answer:(A)
48. Temporal cohesion means
(A) Coincidental cohesion
(B) Cohesion between temporary variables
(C) Cohesion between local variables
(D) Cohesion with respect to time
Answer:(D)
49. Various storage devices used by an
operating system can be arranged as follows in
increasing order of accessing speed :
(A) Magnetic tapes → magnetic disks →
optical disks → electronic disks → main
memory → cache → registers
(B) Magnetic tapes → magnetic disks →
electronic disks → optical disks → main
memory → cache → registers
(C) Magnetic tapes → electronic disks →
magnetic disks → optical disks → main
memory → cache → registers
(D) Magnetic tapes → optical disks →
magnetic disks → electronic disks → main
memory → cache → registers
Answer:(D)
50. How many disk blocks are required to keep
list of free disk blocks in a 16 GB hard disk
with 1 kB block size using linked list of free
disk blocks ? Assume that the disk block
number is stored in 32 bits.
(A) 1024 blocks (B) 16794 blocks
(C) 20000 blocks (D) 1048576 blocks
Answer:(B)
51. Consider an imaginary disk with 40 cylinders.
A request come to read a block on cylinder
11. While the seek to cylinder 11 is in progress,
new requests come in for cylinders 1, 36,
16, 34, 9 and 12 in that order. The number of
arm motions using shortest seek first
algorithm is
(A) 111 (B) 112
(C) 60 (D) 61
Answer:(D)
52. An operating system has 13 tape drives.
There are three processes P1, P2 & P3. Maximum
requirement of P1 is 11 tape drives, P2 is 5 tape
drives and P3 is 8 tape drives. Currently,
P1 is allocated 6 tape drives, P2 is allocated
3 tape drives and P3 is allocated 2 tape drives.
Which of the following sequences represent a safe state ?
(A) P2 P1 P3 (B) P2 P3 P1
(C) P1 P2 P3 (D) P1 P3 P2
Answer:(A)
53. Monitor is an Interprocess Communication
(IPC) technique which can be described as
(A) It is higher level synchronization primitive
and is a collection of procedures,
variables, and data structures grouped together in a special package.
(B) It is a non-negative integer which apart from
initialization can be acted upon by wait
and signal operations.
(C) It uses two primitives, send and receive
which are system calls rather than language
constructs.
(D) It consists of the IPC primitives implemented
as system calls to block the process
when they are not allowed to enter critical region to save CPU time.
Answer:(A)
54. In a distributed computing environment,
distributed shared memory is used which is
(A) Logical combination of virtual memories on the nodes.
(B) Logical combination of physical memories on the nodes.
(C) Logical combination of the secondary memories on all the nodes.
(D) All of the above
Answer:(B)
55. Equivalent logical expression for the Well Formed
Formula (WFF),
~(∀x) F[x]
is
(A) ∀x (~F[x]) (B) ~(∃x) F[x]
(C) ∃x (~F[x]) (D) ∀x F[x]
Answer:(C)
56. An A* algorithm is a heuristic search
technique which
(A) is like a depth-first search where
most promising child is selected for expansion
(B) generates all successor nodes and computes
an estimate of distance (cost) from start
node to a goal node through each of the successors.
It then chooses the successor
with shortest cost.
(C) saves all path lengths (costs) from
start node to all generated nodes and chooses
shortest path for further expansion.
(D) none of the above
Answer:(B)
57. The resolvent of the set of clauses
(A ∨ B, ~A ∨ D, C ∨ ~B) is
(A) A ∨ B (B) C ∨ D
(C) A ∨ C (D) A ∨ D
Answer:(B)
58. Match the following :
a. Script i. Directed graph with labelled nodes for
graphical representation of knowledge
b. Conceptual Dependencies
ii. Knowledge about objects and events is
stored in record-like structures consisting
of slots and slot values.
c. Frames iii. Primitive concepts and rules to represent
natural language statements
d. Associative Network iv. Frame like structures
used to represent
stereotypical patterns for commonly
occurring events in terms of actors, roles,
props and scenes
Codes :
a b c d
(A) iv ii i iii
(B) iv iii ii i
(C) ii iii iv i
(D) i iii iv ii
Answer:(B)
59. Match the following components of an expert system :
a. I/O interface i. Accepts user’s queries and
responds to question through I/O
interface
b. Explanation module ii. Contains facts and rules about the
domain
c. Inference engine iii. Gives the user, the ability to follow
inferencing steps at any time during
consultation
d. Knowledge base iv. Permits the user to communicate
with the system in a natural way
Codes :
a b c d
(A) i iii iv ii
(B) iv iii i ii
(C) i iii ii iv
(D) iv i iii ii
Answer:(B)
60. A computer based information system is needed :
I. as it is difficult for administrative staff to process data.
II. due to rapid growth of information and communication
technology.
III. due to growing size of organizations which
need to process large volume of data.
IV. as timely and accurate decisions are to be taken.
Which of the above statement(s) is/are true ?
(A) I and II
(B) III and IV
(C) II and III
(D) II and IV
Answer:(B)
Answer:(D)
62. Match the following :
List – I List – II
a. Context free grammar i. Linear bounded automaton
b. Regular grammar ii. Pushdown automaton
c. Context sensitive grammar iii. Turing machine
d. Unrestricted grammar iv. Deterministic finite automaton
Codes :
a b c d
(A) ii iv iii i
(B) ii iv i iii
(C) iv i ii iii
(D) i iv iii ii
Answer:(B)
63. According to pumping lemma for context free languages :
Let L be an infinite context free language, then there exists
some positive integer m such
that any w ∈ L with | w | ≥ m can be
decomposed as w = u v x y z
Answer:(B)
Answer:(C)
65. Given a simple image of size 10 × 10
whose histogram models the symbol probabilities
and is given by
Answer:(D)
Answer:(A)
67. If an artificial variable is present in the
‘basic variable’ column of optimal simplex table,
then the solution is
(A) Optimum (B) Infeasible
(C) Unbounded (D) Degenerate
Answer:(B)
68. The occurrence of degeneracy while solving
a transportation problem means that
(A) total supply equals total demand
(B) total supply does not equal total demand
(C) the solution so obtained is not feasible
(D) none of these
Answer:(C)
69. Five men are available to do five different jobs.
From past records, the time (in hours) that
each man takes to do each job is known and
is given in the following table :
Find out the minimum time required
to complete all the jobs.
(A) 5 (B) 11
(C) 13 (D) 15
Answer:(C)
70. Consider the following statements about a
perception :
I. Feature detector can be any function of the input parameters.
II. Learning procedure only adjusts the connection
weights to the output layer.
Identify the correct statement out of the following :
(A) I is false and II is false. (B) I is true and II is false.
(C) I is false and II is true. (D) I is true and II is true.
Answer:(D)
(A) core (B) support
(C) crossover (D) α-cut
Answer:(C)
72. Match the following learning modes w.r.t.
characteristics of available information for
learning :
a. Supervised i. Instructive information on desired responses,
explicitly specified by a teacher.
b. Recording ii. A priori design information for memory storing
c. Reinforcement iii. Partial information about desired responses, or
only “right” or “wrong” evaluative information
d. Unsupervised iv. No information about desired responses
Codes :
a b c d
(A) i ii iii iv
(B) i iii ii iv
(C) ii iv iii i
(D) ii iii iv i
Answer:(A)
73. Which of the following versions of Windows
O.S. contain built-in partition manager
which allows us to shrink and expand pre-defined drives ?
(A) Windows Vista (B) Windows 2000
(C) Windows NT (D) Windows 98
Answer:(A)
74. A Trojan horse is
(A) A program that performs a legitimate function
that is known to an operating system
or its user and also has a hidden component that can
be used for nefarious purposes
like attacks on message security or impersonation.
(B) A piece of code that can attach itself to other
programs in the system and spread to
other systems when programs are copied or transferred.
(C) A program that spreads to other computer
systems by exploiting security holes like
weaknesses in facilities for creation of remote processes
(D) All of the above
Answer:(A)
75. Which of the following computing
models is not an example of distributed computing
environment ?
(A) Cloud computing (B) Parallel computing
(C) Cluster computing (D) Peer-to-peer computing
Answer:(B)
cache memory has cache access time of 50 nano
seconds, main memory access time of 300 nano
seconds, 75% of memory requests are for
read, hit ratio of 0.8 for read access and
the write-through scheme is used. What will be
the average access time of the system both
for read and write requests ?
(A) 157.5 n.sec. (B) 110 n.sec.
(C) 75 n.sec. (D) 82.5 n.sec.
Answer:(A)
2. For switching from a CPU user mode to
the supervisor mode following type of interrupt is
most appropriate
(A) Internal interrupts (B) External interrupts
(C) Software interrupts (D) None of the above
Answer:(C)
3. In a dot matrix printer the time to print a
character is 6 m.sec., time to space in between
characters is 2 m.sec., and the number of
characters in a line are 200. The printing speed
of the dot matrix printer in characters per second
and the time to print a character line are
given by which of the following options ?
(A) 125 chars/second and 0.8 seconds
(B) 250 chars/second and 0.6 seconds
(C) 166 chars/second and 0.8 seconds
(D) 250 chars/second and 0.4 seconds
Answer:(A)
4. Match the following 8085 instructions with the flags :
List – I List – II
a. XCHG i. only carry flag is affected.
b. SUB ii. no flags are affected.
c. STC iii. all flags other than carry flag are affected.
d. DCR iv. all flags are affected.
Codes :
a b c d
(A) iv i iii ii
(B) iii ii i iv
(C) ii iii i iv
(D) ii iv i iii
Answer:(D)
5. How many times will the following loop
be executed ?
LXI B, 0007 H
LOP : DCX B
MOV A, B
ORA C
JNZ LOP
(A) 05 (B) 07
(C) 09 (D) 00
Answer:(B)
6. Specify the contents of the accumulator
and the status of the S, Z and CY flags when 8085
microprocessor performs addition of 87 H and 79 H.
(A) 11, 1, 1, 1 (B) 10, 0, 1, 0
(C) 01, 1, 0, 0 (D) 00, 0, 1, 1
Answer:(D)
7. Location transparency allows :
I. Users to treat the data as if it is
done at one location.
II. Programmers to treat the data as
if it is at one location.
III. Managers to treat the data as
if it is at one location.
Which one of the following is correct ?
(A) I, II and III (B) I and II only
(C) II and III only (D) II only
Answer:(A)
8. Which of the following is correct ?
I. Two phase locking is an optimistic protocol.
II. Two phase locking is pessimistic protocol
III. Time stamping is an optimistic protocol.
IV. Time stamping is pessimistic protocol.
(A) I and III (B) II and IV
(C) I and IV (D) II and III
Answer:(D)
9. __________ rules used to limit the volume of
log information that has to be handled and
processed in the event of system failure
involving the loss of volatile information.
(A) Write-ahead log (B) Check-pointing
(C) Log buffer (D) Thomas
Answer:(B)
10. Let R = ABCDE is a relational scheme
with functional dependency set F = {A → B, B → C,
AC → D}. The attribute closures of A and E are
(A) ABCD, φ (B) ABCD, E
(C) Φ, φ (D) ABC, E
Answer:(B)
11. Consider the following statements :
I. Re-construction operation used in mixed
fragmentation satisfies commutative rule.
II. Re-construction operation used in vertical
fragmentation satisfies commutative rule
Which of the following is correct ?
(A) I
(B) II
(C) Both are correct
(D) None of the statements are correct.
Answer:(D)
12. Which of the following is false ?
(A) Every binary relation is never be in BCNF.
(B) Every BCNF relation is in 3NF.
(C) 1 NF, 2 NF, 3 NF and BCNF are based
on functional dependencies.
(D) Multivalued Dependency (MVD) is
a special case of Join Dependency (JD).
Answer:(A)
13. Which of the following categories of languages
do not refer to animation languages ?
(A) Graphical languages (B) General-purpose languages
(C) Linear-list notations (D) None of the above
Answer:(D)
14. Match the following :
List – I List – II
a. Tablet, Joystick i. Continuous devices
b. Light Pen, Touch Screen ii. Direct devices
c. Locator, Keyboard iii. Logical devices
d. Data Globe, Sonic Pen iv. 3D interaction devices
Codes :
a b c d
(A) ii i iv iii
(B) i iv iii ii
(C) i ii iii iv
(D) iv iii ii i
Answer:(C)
15. A technique used to approximate halftones
without reducing spatial resolution is known as
_________.
(A) Halftoning (B) Dithering
(C) Error diffusion (D) None of the above
Answer:(B)
16. Consider a triangle represented by
A(0, 0), B(1, 1), C(5, 2). The triangle is
rotated by 45 degrees about a point
P(–1, –1). The co-ordinates of the new
triangle obtained after
rotation shall be _______
Answer:(A)
17. In Cyrus-Beck algorithm for line clipping the
value of t parameter is computed by the
relation :
Answer:(A)
18. Match the following :
a. Cavalier Projection i. The direction
of projection is chosen so
that there is no foreshortening of lines
perpendicular to the xy plane.
b. Cabinet Projection ii. The direction of
projection is chosen so
that lines perpendicular to the xy planes
are foreshortened by half their lengths.
c. Isometric Projection iii. The direction
of projection makes equal
angles with all of the principal axis.
d. Orthographic Projection
iv. Projections are characterized by the fact
that the direction of projection is
perpendicular to the view plane.
Codes :
a b c d
(A) i iii iv ii
(B) ii iii i iv
(C) iv ii iii i
(D) i ii iii iv
Answer:(D)
19. Consider the following statements S1, S2 and S3 :
S1 : In call-by-value, anything that is passed into a
function call is unchanged in the
caller’s scope when the function returns.
S2 : In call-by-reference, a function receives
implicit reference to a variable used as
argument.
S3 : In call-by-reference, caller is unable to see
the modified variable used as argument.
(A) S3 and S2 are true. (B) S3 and S1 are true.
(C) S2 and S1 are true. (D) S1, S2, S3 are true.
Answer:(C)
20. How many tokens will be generated
by the scanner for the following statement ?
x = x * (a + b) – 5;
(A) 12 (B) 11
(C) 10 (D) 07
Answer:(A)
21. Which of the following statements is not true ?
(A) MPI_Isend and MPI_Irecv are non-blocking
message passing routines of MPI.
(B) MPI_Issend and MPI_Ibsend are non-blocking
message passing routines of MPI.
(C) MPI_Send and MPI_Recv are non-blocking
message passing routines of MPI.
(D) MPI_Ssend and MPI_Bsend are blocking
message passing routines of MPI.
Answer:(C)
Answer:(D)
Answer:(D)
Answer:(D)
25. For n devices in a network, ________
number of duplex-mode links are required for a
mesh topology.
(A) n(n + 1) (B) n (n – 1)
(C) n(n + 1)/2 (D) n(n – 1)/2
Answer:(D)
26. How many characters per second
(7 bits + 1 parity) can be transmitted over a 3200 bps
line if the transfer is asynchronous ?
(Assuming 1 start bit and 1 stop bit)
(A) 300 (B) 320
(C) 360 (D) 400
Answer:(B)
27. Which of the following is not a field in TCP header ?
(A) Sequence number (B) Fragment offset
(C) Checksum (D) Window size
Answer:(B)
28. What is the propagation time if the distance
between the two points is 48,000 ?
metre/second in cable.
(A) 0.5 ms (B) 20 ms
(C) 50 ms (D) 200 ms
Answer:(D)
29. __________ is a bit-oriented protocol for
communication over point-to-point and
multipoint links.
(A) Stop-and-wait (B) HDLC
(C) Sliding window (D) Go-back-N
Answer:(B)
30. Which one of the following is true for
asymmetric-key cryptography ?
(A) Private key is kept by the receiver and public
key is announced to the public.
(B) Public key is kept by the receiver and private
key is announced to the public.
(C) Both private key and public key
are kept by the receiver.
(D) Both private key and public key
are announced to the public.
Answer:(A)
31. Any decision tree that sorts n elements has height
Answer:(C)
32. Match the following :
Codes :
a b c d
(A) iv ii i iii
(B) ii iv i iii
(C) iv ii iii i
(D) iii ii iv i
Answer:(C)
33. We can show that the clique problem is
NP-hard by proving that
(A) CLIQUE ≤ P 3-CNF_SAT
(B) CLIQUE ≤ P VERTEX_COVER
(C) CLIQUE ≤ P SUBSET_SUM
(D) None of the above
Answer:(D)
34. Dijkstra algorithm, which solves the
single-source shortest--paths problem, is a
_________, and the Floyd-Warshall algorithm,
which finds shortest paths between all
pairs of vertices, is a _________
(A) Greedy algorithm, Divide-conquer algorithm
(B) Divide-conquer algorithm, Greedy algorithm
(C) Greedy algorithm, Dynamic programming algorithm
(D) Dynamic programming algorithm, Greedy algorithm
Answer:(C)
(A) 5 (B) 10
(C) 20 (D) 100
Answer:(B)
36. Suppose that we have numbers between 1
and 1000 in a binary search tree and we want to
search for the number 365. Which of the following
sequences could not be the sequence of
nodes examined ?
(A) 4, 254, 403, 400, 332, 346, 399, 365
(B) 926, 222, 913, 246, 900, 260, 364, 365
(C) 927, 204,913, 242, 914, 247, 365
(D) 4, 401, 389, 221, 268, 384, 383, 280, 365
Answer:(C)
37. Which methods are utilized to control the
access to an object in multi-threaded
programming ?
(A) Asynchronized methods
(B) Synchronized methods
(C) Serialized methods
(D) None of the above
Answer:(B)
38. How to express that some person keeps
animals as pets ?
Answer:(A)
39. Converting a primitive type data into its
corresponding wrapper class object instance is
called
(A) Boxing (B) Wrapping
(C) Instantiation (D) Autoboxing
Answer:(D)
40. The behaviour of the document elements
in XML can be defined by
(A) Using document object
(B) Registering appropriate event handlers
(C) Using element object
(D) All of the above
Answer:(B)
41. What is true about UML stereotypes ?
(A) Stereotype is used for extending the UML language.
(B) Stereotyped class must be abstract
(C) The stereotype indicates that the UML
element cannot be changed
(D) UML profiles can be stereotyped for backward
compatibility
Answer:(A)
42. Which method is called first by an applet program ?
(A) start( ) (B) run( )
(C) init( ) (D) begin( )
Answer:(C)
43. Which one of the following is not a
source code metric ?
(A) Halstead metric (B) Function point metric
(C) Complexity metric (D) Length metric
Answer:(B)
44. To compute function points (FP),
the following relationship is used FP
(i = 1 to n) are value adjustment
factors (VAF) based on n questions.
The value of n is
(A) 12 (B) 14
(C) 16 (D) 18
Answer:(B)
45. Assume that the software team defines a project
risk with 80% probability of occurrence
of risk in the following manner :
Only 70 percent of the software components
scheduled for reuse will be integrated into the
application and the remaining functionality will
have to be custom developed. If 60
reusable components were planned with
average component size as 100 LOC and
software engineering cost for each LOC as $
14, then the risk exposure would be
(A) $ 25,200 (B) $ 20,160
(C) $ 17,640 (D) $ 15,120
Answer:(B)
46. Maximum possible value of reliability is
(A) 100 (B) 10
(C) 1 (D) 0
Answer:(C)
47. ‘FAN IN’ of a component A is defined as
(A) Count of the number of components that can
call, or pass control, to a component A
(B) Number of components related to component A
(C) Number of components dependent on component A
(D) None of the above
Answer:(A)
48. Temporal cohesion means
(A) Coincidental cohesion
(B) Cohesion between temporary variables
(C) Cohesion between local variables
(D) Cohesion with respect to time
Answer:(D)
49. Various storage devices used by an
operating system can be arranged as follows in
increasing order of accessing speed :
(A) Magnetic tapes → magnetic disks →
optical disks → electronic disks → main
memory → cache → registers
(B) Magnetic tapes → magnetic disks →
electronic disks → optical disks → main
memory → cache → registers
(C) Magnetic tapes → electronic disks →
magnetic disks → optical disks → main
memory → cache → registers
(D) Magnetic tapes → optical disks →
magnetic disks → electronic disks → main
memory → cache → registers
Answer:(D)
50. How many disk blocks are required to keep
list of free disk blocks in a 16 GB hard disk
with 1 kB block size using linked list of free
disk blocks ? Assume that the disk block
number is stored in 32 bits.
(A) 1024 blocks (B) 16794 blocks
(C) 20000 blocks (D) 1048576 blocks
Answer:(B)
51. Consider an imaginary disk with 40 cylinders.
A request come to read a block on cylinder
11. While the seek to cylinder 11 is in progress,
new requests come in for cylinders 1, 36,
16, 34, 9 and 12 in that order. The number of
arm motions using shortest seek first
algorithm is
(A) 111 (B) 112
(C) 60 (D) 61
Answer:(D)
52. An operating system has 13 tape drives.
There are three processes P1, P2 & P3. Maximum
requirement of P1 is 11 tape drives, P2 is 5 tape
drives and P3 is 8 tape drives. Currently,
P1 is allocated 6 tape drives, P2 is allocated
3 tape drives and P3 is allocated 2 tape drives.
Which of the following sequences represent a safe state ?
(A) P2 P1 P3 (B) P2 P3 P1
(C) P1 P2 P3 (D) P1 P3 P2
Answer:(A)
53. Monitor is an Interprocess Communication
(IPC) technique which can be described as
(A) It is higher level synchronization primitive
and is a collection of procedures,
variables, and data structures grouped together in a special package.
(B) It is a non-negative integer which apart from
initialization can be acted upon by wait
and signal operations.
(C) It uses two primitives, send and receive
which are system calls rather than language
constructs.
(D) It consists of the IPC primitives implemented
as system calls to block the process
when they are not allowed to enter critical region to save CPU time.
Answer:(A)
54. In a distributed computing environment,
distributed shared memory is used which is
(A) Logical combination of virtual memories on the nodes.
(B) Logical combination of physical memories on the nodes.
(C) Logical combination of the secondary memories on all the nodes.
(D) All of the above
Answer:(B)
55. Equivalent logical expression for the Well Formed
Formula (WFF),
~(∀x) F[x]
is
(A) ∀x (~F[x]) (B) ~(∃x) F[x]
(C) ∃x (~F[x]) (D) ∀x F[x]
Answer:(C)
56. An A* algorithm is a heuristic search
technique which
(A) is like a depth-first search where
most promising child is selected for expansion
(B) generates all successor nodes and computes
an estimate of distance (cost) from start
node to a goal node through each of the successors.
It then chooses the successor
with shortest cost.
(C) saves all path lengths (costs) from
start node to all generated nodes and chooses
shortest path for further expansion.
(D) none of the above
Answer:(B)
57. The resolvent of the set of clauses
(A ∨ B, ~A ∨ D, C ∨ ~B) is
(A) A ∨ B (B) C ∨ D
(C) A ∨ C (D) A ∨ D
Answer:(B)
58. Match the following :
a. Script i. Directed graph with labelled nodes for
graphical representation of knowledge
b. Conceptual Dependencies
ii. Knowledge about objects and events is
stored in record-like structures consisting
of slots and slot values.
c. Frames iii. Primitive concepts and rules to represent
natural language statements
d. Associative Network iv. Frame like structures
used to represent
stereotypical patterns for commonly
occurring events in terms of actors, roles,
props and scenes
Codes :
a b c d
(A) iv ii i iii
(B) iv iii ii i
(C) ii iii iv i
(D) i iii iv ii
Answer:(B)
59. Match the following components of an expert system :
a. I/O interface i. Accepts user’s queries and
responds to question through I/O
interface
b. Explanation module ii. Contains facts and rules about the
domain
c. Inference engine iii. Gives the user, the ability to follow
inferencing steps at any time during
consultation
d. Knowledge base iv. Permits the user to communicate
with the system in a natural way
Codes :
a b c d
(A) i iii iv ii
(B) iv iii i ii
(C) i iii ii iv
(D) iv i iii ii
Answer:(B)
60. A computer based information system is needed :
I. as it is difficult for administrative staff to process data.
II. due to rapid growth of information and communication
technology.
III. due to growing size of organizations which
need to process large volume of data.
IV. as timely and accurate decisions are to be taken.
Which of the above statement(s) is/are true ?
(A) I and II
(B) III and IV
(C) II and III
(D) II and IV
Answer:(B)
Answer:(D)
62. Match the following :
List – I List – II
a. Context free grammar i. Linear bounded automaton
b. Regular grammar ii. Pushdown automaton
c. Context sensitive grammar iii. Turing machine
d. Unrestricted grammar iv. Deterministic finite automaton
Codes :
a b c d
(A) ii iv iii i
(B) ii iv i iii
(C) iv i ii iii
(D) i iv iii ii
Answer:(B)
63. According to pumping lemma for context free languages :
Let L be an infinite context free language, then there exists
some positive integer m such
that any w ∈ L with | w | ≥ m can be
decomposed as w = u v x y z
Answer:(B)
Answer:(C)
65. Given a simple image of size 10 × 10
whose histogram models the symbol probabilities
and is given by
Answer:(D)
Answer:(A)
67. If an artificial variable is present in the
‘basic variable’ column of optimal simplex table,
then the solution is
(A) Optimum (B) Infeasible
(C) Unbounded (D) Degenerate
Answer:(B)
68. The occurrence of degeneracy while solving
a transportation problem means that
(A) total supply equals total demand
(B) total supply does not equal total demand
(C) the solution so obtained is not feasible
(D) none of these
Answer:(C)
69. Five men are available to do five different jobs.
From past records, the time (in hours) that
each man takes to do each job is known and
is given in the following table :
Find out the minimum time required
to complete all the jobs.
(A) 5 (B) 11
(C) 13 (D) 15
Answer:(C)
70. Consider the following statements about a
perception :
I. Feature detector can be any function of the input parameters.
II. Learning procedure only adjusts the connection
weights to the output layer.
Identify the correct statement out of the following :
(A) I is false and II is false. (B) I is true and II is false.
(C) I is false and II is true. (D) I is true and II is true.
Answer:(D)
(A) core (B) support
(C) crossover (D) α-cut
Answer:(C)
72. Match the following learning modes w.r.t.
characteristics of available information for
learning :
a. Supervised i. Instructive information on desired responses,
explicitly specified by a teacher.
b. Recording ii. A priori design information for memory storing
c. Reinforcement iii. Partial information about desired responses, or
only “right” or “wrong” evaluative information
d. Unsupervised iv. No information about desired responses
Codes :
a b c d
(A) i ii iii iv
(B) i iii ii iv
(C) ii iv iii i
(D) ii iii iv i
Answer:(A)
73. Which of the following versions of Windows
O.S. contain built-in partition manager
which allows us to shrink and expand pre-defined drives ?
(A) Windows Vista (B) Windows 2000
(C) Windows NT (D) Windows 98
Answer:(A)
74. A Trojan horse is
(A) A program that performs a legitimate function
that is known to an operating system
or its user and also has a hidden component that can
be used for nefarious purposes
like attacks on message security or impersonation.
(B) A piece of code that can attach itself to other
programs in the system and spread to
other systems when programs are copied or transferred.
(C) A program that spreads to other computer
systems by exploiting security holes like
weaknesses in facilities for creation of remote processes
(D) All of the above
Answer:(A)
75. Which of the following computing
models is not an example of distributed computing
environment ?
(A) Cloud computing (B) Parallel computing
(C) Cluster computing (D) Peer-to-peer computing
Answer:(B)
Computer Science 2014 December UGC Net Paper III
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