University Grants Commission NET Computer Science and Applications papers of past yea

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1. COCOMO stands for
(A) COmposite COst MOdel
(B) COnstructive COst MOdel
(C) COnstructive COmposite
MOdel
(D) COmprehensive COnstruction
MOdel
2. Match the following :
a. Good quality i. Program does
not fail for a
specified time in
a given
environment
b. Correctness ii. Meets the
functional
requirements
c. Predictable iii. Meets both
functional and
non-functional
requirements
d. Reliable iv. Process is under
statistical
control
Codes :
a b c d
(A) iii ii iv i
(B) ii iii iv i
(C) i ii iv iii
(D) i ii iii iv
3. While estimating the cost of
software, Lines Of Code (LOC) and
Function Points (FP) are used to
measure which one of the following ?
(A) Length of code
(B) Size of software
(C) Functionality of software
(D) None of the above
4. A good software design must have
(A) High module coupling, High
module cohesion
(B) High module coupling, Low
module cohesion
(C) Low module coupling, High
module cohesion
(D) Low module coupling, Low
module cohesion
5. Cyclometric complexity of a flow
graph G with n vertices and e edges
is
(A) V(G) = e+n–2
(B) V(G) = e–n+2
(C) V(G) = e+n+2
(D) V(G) = e–n–2
6. When the following code is executed
what will be the value of x and y ?
int x = 1, y = 0;
y = x++;
(A) 2,1
(B) 2,2
(C) 1,1
(D) 1,2
7. How many values can be held by an
array A(–1,m;1,m) ?
(A) m
(B) m2
(C) m(m+1)
(D) m(m+2)


8. What is the result of the expression
(1&2)+(3/4) ?
(A) 1
(B) 2
(C) 3
(D) 0
9. How many times the word ‘print’
shall be printed by the following
program segment ?
for (i=1, i<2,i++)
for (j=1,j<2,j++)
for(k=1,k<2,k++)
printf("print/n")
(A) 1
(B) 3
(C) 6
(D) 8
10. Which of the following is not a type
of Database Management System ?
(A) Hierarchical
(B) Network
(C) Relational
(D) Sequential
11. Manager’s salary details are to be
hidden from Employee Table. This
Technique is called as
(A) Conceptual level Datahiding
(B) Physical level Datahiding
(C) External level Datahiding
(D) Logical level Datahiding
12. A Network Schema
(A) restricts to one to many
relationship
(B) permits many to many
relationship
(C) stores Data in a Database
(D) stores Data in a Relation
13. Which normal form is considered as
adequate for usual database design ?
(A) 2NF
(B) 3NF
(C) 4NF
(D) 5NF
14. If D1,D2, .. ..Dn are domains in a
relational model, then the relation is
a table, which is a subset of
(A) D1+D2+ … +Dn
(B) D1×D2× … ×Dn
(C) D1∪D2∪ … ∪Dn
(D) D1–D2– … –Dn
15. Which of the following addresses is
used to deliver a message to the
correct application program running
on a host ?
(A) Port
(B) IP
(C) Logical
(D) Physical
16. In ________ substitution, a character
in the plaintext is always changed to
the same character in the ciphertext,
regardless of its position in the text.
(A) polyalphabetic
(B) monoalphabetic
(C) transpositional
(D) multialphabetic
17. In classful addressing, the IP address
190.255.254.254 belongs to
(A) Class A
(B) Class B
(C) Class C
(D) Class D

18. In hierarchical routing with 4800
routers, what region and cluster sizes
should be chosen to minimize the
size of the routing table for a threelayer
hierarchy ?
(A) 10 clusters, 24 regions and 20
routers
(B) 12 clusters, 20 regions and 20
routers
(C) 16 clusters, 12 regions and 25
routers
(D) 15 clusters, 16 regions and 20
routers
19. In IPv4 header, the ______ field is
needed to allow the destination host
to determine which datagram a newly
arrived fragments belongs to.
(A) identification
(B) fragment offset
(C) time to live
(D) header checksum
20. Given L1=L(a*baa*) and L2=L(ab*).
The regular expression corresponding
to language L3 = L1/L2 (right
quotient) is given by
(A) a*b
(B) a*baa*
(C) a*ba*
(D) None of the above
21. Given the production rules of a
grammar G1 as
S1 → AB | aaB
A → a | Aa
B → b
and the production rules of a
grammar G2 as
S2 → aS2bS2 | bS2aS2 | λ
Which of the following is correct
statement ?
(A) G1 is ambiguous and G2 is not
ambiguous.
(B) G1 is ambiguous and G2 is
ambiguous.
(C) G1 is not ambiguous and G2 is
ambiguous.
(D) G1 is not ambiguous and G2 is
not ambiguous.
22. Given a grammar : S1 → Sc, S →
SA | A, A → aSb | ab, there is a
rightmost derivation S1 ⇒ Sc ⇒
SAC ⇒ SaSbc
Thus, SaSbc is a right sentential
form, and its handle is
(A) SaS
(B) bc
(C) Sbc
(D) aSb
23. The equivalent production rules
corresponding to the production rules
S → Sα1 |Sα2 | β1 | β2 is
(A) S → β1 | β2, A → α1A | α2A | λ
(B) S → β1| β2| β1A | β2A,
A → α1A | α2A
(C) S → β1 | β2, A → α1A | α2A
(D) S → β1 | β2 | β1A | β2A,
A → α1A | α2A | λ
24. Given a Non-deterministic Finite
Automation (NFA) with states p and r
as initial and final states respectively
and transition table as given below :
a b
p – q
q r s
r r s
s r s
The minimum number of states
required in Deterministic Finite
Automation (DFA) equivalent to
NFA is
(A) 5
(B) 4
(C) 3
(D) 2
25. Which is the correct statement(s) for
Non Recursive predictive parser ?
S1 : First(α) = {t| α ⇒
* tβ for some
string β} ⇒
*tβ
S2 : Follow(X)={ a| S⇒
*αXaβ for
some strings α and β}
(A) Both statements S1 and S2 are
incorrect.
(B) S1 is incorrect and S2 is
correct.
(C) S1 is correct and S2 is
incorrect.
(D) Both statements S1 and S2 are
correct.
27. For a B-tree of height h and degree t,
the total CPU time used to insert a
node is
(A) O(h log t)
(B) O(t log h)
(C) O(t2h)
(D) O(th)
28. The time complexity to build a heap
with a list of n numbers is
(A) O(log n)
(B) O(n)
(C) O(n logn)
(D) O(n2)
29. The value of postfix expression :
8 3 4 + – 3 8 2 / + * 2 $ 3 + is
(A) 17
(B) 131
(C) 64
(D) 52
30. Consider the following statements for
priority queue :
S1 : It is a data structure in which
the intrinsic ordering of the
elements does determine the
result of its basic operations.
S2 : The elements of a priority
queue may be complex
structures that are ordered on
one or several fields.
Which of the following is correct ?
(A) Both S1 and S2 are incorrect.
(B) S1 is correct and S2 is
incorrect.
(C) S1 is incorrect and S2 is
correct.
(D) Both S1 and S2 are correct.
31. Repository of information gathered
from multiple sources, storing under
unified scheme at a single site is
called as
(A) Data mining
(B) Meta data
(C) Data warehousing
(D) Database
32. The task of correcting and pre
processing data is called as
(A) Data streaming
(B) Data cleaning
(C) Data mining
(D) Data storming

33. Using data p=3, q=11, n=pq, d=7 in
RSA algorithm find the cipher text of
the given plain text SUZANNE
(A) BUTAEEZ
(B) SUZANNE
(C) XYZABCD
(D) ABCDXYZ
34. The relation “divides” on a set of
positive integers is ________.
(A) Symmetric and transitive
(B) Anti symmetric and transitive
(C) Symmetric only
(D) Transitive only
35. Give as good a big–O estimate as
possible for the following functions :
(nlogn+n2)(n3+2) and (n!+2n)
(n3+log(n2+1))
(A) O(n5+2n2) & O(n3*n!)
(B) O(n5) & O(n3*2n)
(C) O(n5) & O(n3* n!)
(D) O(n5+2n2) & O(n3*2n)
36. A test contains 100 true/false
questions. How many different ways
can a student answer the questions on
the test, if the answer may be left
blank also.
(A) 100P2
(B) 100C2
(C) 2100
(D) 3100
37. Which of the following connected
simple graph has exactly one
spanning tree ?
(A) Complete graph
(B) Hamiltonian graph
(C) Euler graph
(D) None of the above
38. How many edges must be removed to
produce the spanning forest of a
graph with N vertices, M edges and
C connected components ?
(A) M+N–C
(B) M–N–C
(C) M–N+C
(D) M+N+C
39. Which of the following shall be a
compound proposition involving the
propositions p, q and r, that is true
when exactly two of the p, q and r are
true and is false otherwise ?
(A) (p ∨ q ∧ ⎤ r) ∨ ( p ∧ q ∧ r) ∧ (⎤ p ∧ q ∨ r)
(B) (p ∧ q ∨ r) ∧ ( p ∧ q ∧ r) ∨ (⎤ q ∧ ⎤ p∧ ⎤ r)
(C) (p ∧ q ∧⎤ r) ∨ ( p ∧ ⎤ q ∧ r) ∨ (⎤ p ∧ q ∧ r)
(D) (p ∨ r ∧ q) ∨ ( p ∧ q ∧ r) ∨ (⎤ p ∧ q ∧ r)
40. The truth value of the statements :
∃!xP(x) → ∃xP(x) and ∃!x⎤ P(x) →
⎤∀xP(x), (where the notation ∃!xP(x)
denotes the proposition “There exists
a unique x such that P(x) is true”) are :
(A) True and False
(B) False and True
(C) False and False
(D) True and True
41. How many different Boolean
functions of degree 4 are there ?
(A) 24
(B) 28
(C) 212
(D) 216
42. A Boolean operator s is defined as
follows :
1 s 1 = 1, 1 s 0 = 0, 0 s 1 = 0 and
0 s 0 = 1
What will be the truth value of the
expression (x s y) s z = x s (y s z) ?
(A) Always false
(B) Always true
(C) Sometimes true
(D) True when x, y, z are all true
43. Which one of the following is
decimal value of a signed binary
number 1101010, if it is in 2’s
complement form ?
(A) – 42
(B) – 22
(C) – 21
(D) – 106
44. A set of processors P1, P2, ……, Pk
can execute in parallel if Bernstein’s
conditions are satisfied on a pairwise
basis; that is
P1 || P2 || P3 || ….. || Pk if and only if :
(A) Pi || Pj for all i ≠ j
(B) Pi || Pj for all i = j+1
(C) Pi || Pj for all i < j
(D) Pi || Pj for all i > j
45. When a mobile telephone physically
moves from one to another cell, the
base station transfers ownership to
the cell getting strongest signal. This
process is known as _______.
(A) handoff
(B) mobile switching
(C) mobile routing
(D) cell switching
46. A virtual memory based memory
management algorithm partially
swaps out a process. This is an
example of
(A) short term scheduling
(B) long term scheduling
(C) medium term scheduling
(D) mutual exclusion
47. Assuming that the disk head is
located initially at 32, find the
number of disk moves required with
FCFS if the disk queue of I/O block
requests are 98, 37, 14, 124, 65, 67 :
(A) 310
(B) 324
(C) 320
(D) 321
48. Let the page fault service time be 10
millisecond(ms) in a computer with
average memory access time being
20 nanosecond(ns). If one page fault
is generated for every 106 memory
accesses, what is the effective access
time for memory ?
(A) 21 ns
(B) 23 ns
(C) 30 ns
(D) 35 ns
49. Consider the following UNIX
command :
Which of the following functions
shall be performed by this command ?
(A) Sort, taking the input from
“temp”, prints 30 lines from
temp and delete the file temp
(B) Sort the file “temp”, removes
30 lines from temp and delete
the file temp
(C) Sort, taking the input from “in”
and writing the output to
“temp” then prints 30 lines
from temp on terminal. Finally
“temp” is removed.
(D) Sort, taking the input from
“temp” and then prints 30 lines
from “temp” on terminal.
Finally “temp” is removed.
50. The mv command changes
(A) the inode
(B) the inode-number
(C) the directory entry
(D) both the directory entry and the
inode



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Contact Details:
University Grants Commission New Delhi
Bahadur Shah Zafar Marg,
Balmiki Basti,
Vikram Nagar,
New Delhi,
Delhi 110002 ‎
093 33 778791 ‎
India

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