UGC NET Computer Science Paper III Jun 2013
1. The Software Maturity Index (SMI) is defined as
SMI = [Mf -(Fa + Fc + Fd )] / Mf Where
Mf = the number of modules in the current release.
Fa = the number of modules in the current release that have been added.
Fc = the number of modules in the current release that have been changed.
Fd = the number of modules in the current release that have been deleted.
The product begins to stabilize when
(A) SMI approaches 1
(B) SMI approaches 0
(C) SMI approaches -1
(D) None of the above
2. Match the following:
a. Watson- Felix model intensity i. Failure
b. Quick-Fix model ii. Cost estimation
c. Putnam resource allocation model iii. Project planning
d. Logarithmetic- Poisson Model iv. Maintenance
Codes:
a b c d
(A) ii i iv iii
(B) i ii iv iii
(C) ii i iii iv
(D) ii iv iii i
3. ________is a process model that removes defects before they can precipitate serious hazards.
(A) Incremental model
(B) Spiral model
(C) Clean room software engineering
(D) Agile model
4. Equivalence partitioning is a ______ method that divides the input domain of a program into classes of data from which test cases can be derived.
(A) White-box testing
(B) Black-box testing
(C) Orthogonal amIy testing
(D) Stress testing
5. The following three golden rules
(i) Place the user in control
(ii) Reduce the user's memory load
(iii) Make the interface consistent are for
(A) User satisfaction
(B) Good interface design
(C) Saving system's resources
(D) None of these
6.Software safety is a __________ activity that focuses on the identification and assessment of potential hazards that may affect software negatively and cause an entire system to fail.
(A) Risk mitigation, monitoring and management
(B) Software quality assurance
(C) Software cost estimation
(D) Defect removal efficiency
7. The "PROJECT' operator of a relational algebra creates a new table that has always
(A) More columns than columns in original table
(B) More rows than original table
(C) Same number of rows as the original table
(D) Same number of columns as the original table
8. The employee information of an Organization is stored in the relation:
Employee (name, sex, salary, deptname) Consider the following SQL query
Select deptname from Employee Where sex = 'M' group by deptname
having avg (salary) > {select avg (salary) from Employee}
Output of the given query corresponds to
(A) Average salary of employee more than average salary of the organization.
(B) Average salary less than average salary of the organization.
(C) Average salary of employee equal to average salary of the organization.
(D) Average salary of male employees in a department is more than average salary of the organization.
9. For a database relation R(a, b, c, d) where the domains of a. b, c. d include only the atomic values. The
functional dependency a à c, b à d holds in the following relation
(A) In INF not in 2NF
(B) In 2NF not in 3NF
(C) In 3NF
(D) In INF
10. Match the following:
a. RAID 0 i. Bit interleaved parity
b. RAID 1 ii. Non redundant stripping
c. RAID 2 iii. Mirrored disks
d. RAID 3 iv. Error correcting codes
Codes :
a b c d
(A) iv i ii iii
(B) iii iv i ii
(C) iii i iv ii
(D) iii ii iv i
Note: Wrong options given by UGC NET
11. The golden ratio φ and its conjugate φ both satisfy the equation
(A) x3-x-l = 0
(B) x3+x-l = 0
(C) x2-x-l = 0
(D) x2+x-l = 0
12. The solution of recurrence relation
T(n) = 2T{floor (√ n)) + logn is
{A) O(n log log logn)
(B) O(n log logn)
(C) O(log logn)
(D) O(logn log logn)
13. In any n-clement heap, the number of nodes of height h is
(A) less than equal to [n/2h]
(B) greater than [n/2h]
(C) greater than [n/2h+1]
(D) less than equal to [n/2h+1]
14. A data file of 1,00,000 characters contains only the characters g-l, with the frequencies as indicated in table:
g
|
h
|
i
|
j
|
k
|
l
|
|
Frequency in thousand
|
45
|
13
|
12
|
16
|
9
|
5
|
(A) 2,52,000 hits
(B) 2,64,000 bits
(C) 2,46,000 hits
(D) 2,24,000 bits
15. A vertex cover of an undirected graph G(V, E) is a subset V1 ⊆ V vertices such that
(A) Each pair of vertices in V1connected by an edge
(B) If (u, v) ∈ E then u ∈ V1 and v ∈ V1
(C) If (u, v) ∈ E then u ∈ V1 or v ∈ V1
(D) All pairs of vertices in V1 are not connected by an edge
16. In a fully connected mesh network with n devices, there are ____ physical channels to link all devices.
(A) n(n-1)/2 (B) n(n+1)/2
(C) 2n (D) 2n+1
17. The baud rate of a signal is 600 baud/second. If each signal unit carries 6 bits, then the bit rate of a signal is __________
(A) 3600
(B) 100
(C) 6/600
(D) None of the above
Hint: baudrate * bit =bit rate
18. Match the following:
a. Data link layer i. Flow control
b. Network layer ii. Node to node delivery
c. Transport layer iii. Mail services
d. Application layer iv Routing
Codes:
a b c d
(A) ii i iv iii
(B) ii iv i iii
(C) ii i iii iv
(D) ii iv iii i
19. An image is 1024*800 pixels with 3 bytes/pixel. Assume the image is uncompressed. How long does it take to transmit it over a 10 -Mbps Ethernet?
(A) 196.6 seconds
(B) 19.66 seconds
(C) 1.966 seconds
(D) 0.1966 seconds
Hint: [1024*800*3*8]/10*1000*1000 converting to bits
20. The ______ measures the relative strengths of two signals or a signal at two different points.
(A) frequency
(B) attenuation
(C) throughput
(D) decibel
21. Which one of the following media is multidrop?
(A) Shielded Twisted pair cable
(B) Unshielded Twisted pair cable
(C) Thick Coaxial cable
(D) Fiber Optic cable
22. What is the baud rate of the standard 10 Mbps Ethernet?
(A) 10 megabaud (B) 20 megabaud
(C) 30 megabaud (D) 40 megabaud
23. At any iteration of simplex method, if ∆j (Zj - Cj) corresponding to any non·basic variable Xj is obtained as zero, the solution under the test is
(A) Degenerate solution
(B) Unbounded solution
(C) Alternative solution
(D) Optimal solution
24. A basic feasible solution to a m-origin, n-destination transportation problem is said to be _______ if the number of positive allocations are less than m + n - 1.
(A) degenerate
(B) non-degenerate
(C) unbounded
(D) unbalanced
25. The total transportation cost in an initial basic feasible solution to the following transportation problem
using Vogel's Approximation method is
W1
|
W2
|
W3
|
W4
|
W5
|
Supply
|
|
F1
|
4
|
2
|
3
|
2
|
6
|
8
|
F2
|
5
|
4
|
5
|
2
|
1
|
12
|
F3
|
6
|
5
|
4
|
7
|
3
|
14
|
Demand
|
4
|
4
|
6
|
8
|
8
|
26. An actor in an animation is a small program invoked _______ per frame to detennine the characteristics of some object in the animation.
(A) once (B) twice (C) 30 times (D) 60 times
27. Bresenham line drawing algorithm is attractive because it uses
(A) Real arithmetic only
(B) Integer arithmetic only
(C) Floating point arithmetic
(D) Real and integer arithmetic
28. The refresh rate above which a picture stops flickering and fuses into a steady image is called ________
(A) Crucial fusion frequency
(B) Current frequency fusion
(C) Critical fusion frequency
(D) Critically diffused frequency
29. In homogenous coordinate system (x, y. z) the points with z = 0 are called
(A) Cartesian points
(B) Parallel points
(C) Origin point
(D) Point at infinity
30. If 40 black lines interleaved with 40 white lines can be distinguished across one inch, the resolution is
(A) 40 line-pairs per inch
(B) 80 line-pairs per inch
(C) 1600 lines per inch
(D) 40 lines per inch
31. Images tend to be very large collection of data. The size of memory required for a 1024 by 1024 image in which the colour of each pixel is represented by a n-bit number, (in an 8 bit machines) is
(A) n x 8 MB
(B) n/ 8MB
(C) (1024x 1024)/8MB
(D) 1024MB
31. Arrays in C language can have ____with reference to memory representation.
(A) n-subscripts
(B) two-subscripts
(C) only one subscript
(D) three subscripts only
33. Refer the points as listed below:
(a) What are the operator precedence rules?
(b) What are the operator associativity rules?
(c) What is the order of operand evaluation?
(d) Are there restrictions on operand evaluation side effects ?
Which of the above must be considered as primary design issues for arithmetic expressions?
(A) (a), (b) and (c)
(B) (a), (c) and (d)
(C) (a), (b) and (d)
(D) (a), (b), (c) and (d)
34. Hom clauses are special kinds of propositions which can be described as
(A) Single atomic proposition on left side.
(B) Single or multiple atomic proposition on left side.
(C) A single atomic proposition on left side and a single atomic proposition on right side.
(D) A single atomic proposition on left side or an empty left side.
35. Which of the following is/are the fundamental semantic model(s) of parameter passing?
(A) in mode
(B) out mode
(C) in-out mode
(D) all of the above
36. The grammar with production rules
S à aSb|SS|λ
generates language L given by :
(A) L = {w ∈{a,b}*| na (w)= nb (w) and
na (v) ≥ nb (v) where v is any prefix of w}
(B) L = {w ∈{a,b}*| na (w)= nb (w) and na
(v) ≤ nb
(v) where v is any prefix of w}
(C) L = {w ∈{a,b}*| na (w)≠ nb (w) and na (v)
≥ nb (v) where v is any prefix of w}
(D) L = {w ∈{a,b}*| na (w)≠nb (w) and na (v)
≤ nb
(v) where v is any prefix of w}
37. A
pushdown automation M = (Q, Σ, Γ, δ, q0, z, F) is a set to be deterministic subject to
which of the following condition(s), for every q ∈ Q, a∈Σ U{ λ } and b ∈Γ
(s1) δ(q, a, b) contains
at most one element
(s2) if
δ(q, λ, b) is not empty than δ(q, c, b) must be empty for
every c ∈Σ
(A)
only s1
(B)
only s2
(C)
both s1 and s2
(D) neither
s1 nor s2
38. For every context free grammar (G) there exists an algorithm that passes any W ∈ L(G) in number of steps proportional to
(A) |n|w| (B) |w| (C) |w|2 (D) |w|3
39.
Match the following:
a. Context sensitive language i. Deterministic finite automation
a. Context sensitive language i. Deterministic finite automation
b.
Regular grammar
ii. Recursive enumerable
c.
Context free grammar iii. Recursive language
d.
Unrestricted grammar
iv. Pushdown automation
codes:
a
b c d
(A) ii i iv iii
(B) iii iv
i
iii
(C) iii i
iv ii
(D) ii iv i iii
40. The statements s1 and s2 are given as :
sl : Context sensitive languages are closed under intersection. concatenation, substitution and inverse homomorphism.40. The statements s1 and s2 are given as :
s2 Context free languages are closed under complementation. substitution and homomorphism.
Which of the following is correct statement?
(A) Both s1 and s2 are correct.
(B) s1 is correct and s2 is not correct.
(C) sl is not correct and s2 is correct.
(D) Both s1 and s2 are not correct.
41. Which one of the following is not an addressing mode?
(A) Register indirect
(B) Autoincrement
(C) Relative indexed
(D) Immediate operand
42. Computers can have instruction formats with
(A) only two address and three address instructions
(B) only one address and two address instructions
(C) only one address, two address .and three address instructions
(D) zero address, one address, two address and three address instructions
43. Which is not a typical program control instruction?
(A) BR (B) JMP (C) SHL (D) TST
44. Interrupt which arises from illegal or erroneous use of an instruction or data is
(A) Software interrupt
(B) Internal interrupt
(C) External interrupt
(D) All of the above
45. The simplified function in product of sums of Boolean function F(W, X, Y, Z) =Σ(0, 1,2,5,8,9.10) is
(A) (W' + X') (Y' + Z') (X' + Z)
(B) (W' + X') (Y' + Z') (X' + Z')
(C) (W' + X') (Y' + Z) (X' + Z)
(D) (W' + X') (Y + Z') (X' + Z)
46. Match the following:
a. TTL i High component density
b. ECL ii Low power consumption
c. MOS iii Evolution of "diode-transistor-logic"
d.CMOS iv High speed digital circuits
codes:
a
b c d
(A) iii ii i iv
(B) i iv
i
ii
(C) iii iv
i ii
(D) i ii iii iv
47. Match the following:
a. Foreign keys i. Domain constraint
b. Private key ii. Referential integrity
c. Event control action model iii. Encryption
d. Data security iv. Trigger
codes:
a
b c d
(A) iii ii i iv
(B) ii i
iv
iii
(C) iii iv
i ii
(D) i ii iii iv
48. When an array is passed as a parameter to a function which of the following statements is correct?
(A) The function can change values in the original array.
(B) The function cannot change values in the original array.
(C) Results in compilation error.
(D) Results in runtime error
49. Suppose you want to delete the name that occurs before "Vivek" in an alphabetical listing. Which of the following data structures shall be most efficient for this operation?
(A) Circular linked list
(B) Doubly linked list
(C) Linked list
(D) Dequeue
50. What will be the output of the following segment of the program ?
main( )
(
char *s = "hello world";
int i = 7;
Printf("%.*s", i,s);
}
(A) Syntax error
(B) hello w
(C) hello
(D) o world
Note: All the given options are wrong - output for the given c progam is %.*s
51. Trace the error:
void main()
(
int *b, &a;
*b=20
printf("%d, %d", a, *b)
}
(A) No error
(B) Logical error
(C) Syntax error
(D) Semantic error
52. Match the following:
a. calloc() i. Frees previously allocated space
b. free() ii. Modifies previously allocated space
c. malloc() iii. Allocates space for array
d. realloc() iv. Allocates requested size of space
codes:
a
b c d
(A) iii i iv ii
(B) iii ii
i
iv
(C) iii iv
i ii
(D) iv ii iii i53. Binary symmetric channel uses
(A) Half duplex protocol
(B) Full duplex protocol
(C) Bit oriented protocol
(D) None ofthe above
54. Hamming distance between 100101000110 and 110111101101 is
(A) 3 (B) 4 (C) 5 (D) 6
55. Given code word 1110001010 is to be transmitted with even parity check bit. The encoded word to be transmitted for this code is
(A) 11100010101 (B) 11100010100 (C) 1110001010 (D) 111000101
56. The number of distinct binary images which can be generated from a given binary image of right M x N are
(A) M + N (B) M x N (C) 2M+N (D) 2MN
57. If f(x, y) is a digital image, then x, y and amplitude values of f are
(A) Finite
(B) Infinite
(C) Neither finite nor infinite
(D) None of the above
58. Consider the following processes with time slice of 4 milliseconds (I/O requests are ignored) :
Process A B C D
Arrival time 0 1 2 3
CPU cycle 8 4 9 5
The average tum around time of these processes will be
(A) 19.25 milliseconds
(B) 18.25 milliseconds
(C) 19.5 milliseconds
(D) 18.5 milliseconds
59. A job has four pages A, B, C, D and the main memory has two page frames only. The job needs to
process its pages in following order: ABACABDBACD Assuming that a page interrupt occurs when a new page is brought in the main memory, irrespective of whether the page is swapped out or not. The number of page interrupts in FIFO and LRU page replacement algorithms are
(A) 9 and 7 (B) 7 and 6 (C) 9 and 8 (D) 8 and 6
60. Suppose S and Q are two semaphores initialized to 1. PI and P2 are two processes which are sharing resources.
P1 has statements P2 has statements
wait(S) ; wait(Q) ;
wait(Q) ; wait(S) ;
critical- critical-
section1; section 2;
signal(S) ; signal(Q) ;
signal(Q) ; signal(S) ;
Their execution may sometimes lead to an undesirable situation called
(A) Starvation
(B) Race condition
(C) Multithreading
(D) Deadlock
61. An operating system using banker's algorithm for deadlock avoidance has ten dedicated devices (of same type) and has three processes P1, P2 and P3 with maximum resource requirements of 4, 5 and 8 respectively. There are two states of allocation of devices as follows:
State I Processes P1 P2 P3
Devices allocated 2 3 4
State 2 Processes P1 P2 P3
Devices allocated 0 2 4
Which of the following is correct?
(A) State 1 is unsafe and state 2 is safe.
(B) State I is safe and state 2 is unsafe.
(C) Both, state I and state 2 are safe.
(D) Both, state I and state 2 are unsafe.
62. Let the time taken to switch between user mode and kernel mode of execution be T1 while time taken to switch between two user processes be T2. Which of the following is correct?
(A) T1 <T2
(B) T1 >T2
(C) T1 = T2
(D) Nothing can be said about the relation between T1 and T2
63. Working set model is used in memory management to implement the concept of
(A) Swapping
(B) Principal of Locality
(C) Segmentation
(D) Thrashing
64. A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry ?
(A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB
Explanation:
65. A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct?
(A) OS maintains only scheduling .and accounting information for each thread.
(B) OS maintains only CPU registers for each thread.
(C) OS does not maintain a separate stack for each thread.
(D) OS does not maintain virtual memory state for each thread.
66. The versions of windows operating system like windows XP and window Vista uses following file system:
(A) FAT-16
(B) FAT-32
(C) NTFS (NT File System)
(D) All of the above
67. Which one of the following is a correct implementation of the meta-predicate "not" in PROLOG (Here G
represents a goal) ?
(A) not(G):- !, call(G), fail. not(G).
(B) not(G):- cal1(G), !, fail.not(G).
(C) not(G):- cal1(G), fail, !. not(G).
(D) not(G):- cal1(G), fail. not(G):- !.
68. Which one of the following is not an informed search technique?
(A) Hill climbing search
(B) Best first search
(C) A* search
(D) Depth first search
69. If we convert
∃u ∀v ∀x ∃y (Pf(u),v,x,y) ---> Q(u,v,y)) to ∀v ∀x (Pf(a),v,x, g(v,x)) --> Q(a,v,g(v,x)))
This process is known as
(A) Simplification
(B) Unification
(C) Skolemization
(D) Resolution
70. Given two jugs of capacities 5 litres and 3 litres with no measuring markers on them. Assume that there
is endless supply of water. Then the minimum number of states to measure 4 litres water will be
(A) 3 (B) 4 (C) 5 (D) 7
71. The map colouring problem can be solved using which of the following technique?
(A) Means·end analysis
(B) Constraint satisfaction
(C) AO' search
(D) Breadth first search
72. Which of the following is a knowledge representation technique used to represent knowledge about stereotype situation?
(A) Semantic network
(B) Frames
(C) Scripts
(D) Conceptual Dependency
73. A fuzzy set A on R is ________ iff A(λx1 + (1- λ)x2) ≥ min [A(x1),A(x2)]
for all x1, x2 ∈R and all λ ∈ [0,1], where min denotes the minimum operator
for all x1, x2 ∈R and all λ ∈ [0,1], where min denotes the minimum operator
(A)Support
(B)α-cut(C)Convex
(D)Concave
74. If A and B are two fuzzy sets with membership functions
μA(x) = {0.6,0.5,0.1,0.7, 0.8}
μB(x) = {0.9,0.2,0.6, 0.8, 0.5}
Then the value of μAUB(x)will be(A) {0.9, 0.5, 0.6, 0.8, 0.8}
(B) {0.6, 0.2, 0.1, 0.7, 0.5}
(C) {0.1, 0.5, 0.4, 0.2, 0.2}
(D) {0.1, 0.5, 0.4, 0.2, 0.3}
75. Consider a single perception with weights as given in the following figure:
(A) OR problem
(B) AND problem
(C) XOR problem
(D) All of the above
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