Computer Science Solved Paper 2 ( December,2012 )

41. Enumeration is a process of

(A) Declaring a set of numbers

(B) Sorting a list of strings

(C) Assigning a legal values possible for a variable

(D) Sequencing a list of operators

Answer: (D)

42. Which of the following mode declaration is used in C++ to open a file for input?

(A) ios: : app

(B) In:: ios

(C) ios: : file

(D) ios: : in

Answer: (B)

43. Data Encryption Techniques are particularly used for ______.

(A) Protecting data in Data Communication System.

(B) Reduce Storage Space Requirement.

(C) Enhances Data Integrity.

(D) Decreases Data Integrity.

Answer: (B)

44. Let L be a set accepted by a nondeterministic finite automaton. The number of states in non-deterministic finite automaton is |Q|. The maximum number of states in equivalent finite automaton that accepts L is

(A) |Q|

(B) 2|Q|

(C) 2|Q| – 1

(D) 2|Q|

Answer: (A)

45. What is the result of the following expression?

 (1 & 2) + (3 & 4)

(A) 1

(B) 3

(C) 2

(D) 0

Answer: (A)

46. Back propagation is a learning technique that adjusts weights in the neural network by propagating weight changes.

(A) Forward from source to sink No

(B) Backward from sink to source from position p

(C) Forward from source to hidden nodes

(D) Backward from since to hidden nodes

Answer: (C)

47. Match the following:

a. TTL             1. High fan out

b. ECL             2. Low propagation delay

c. CMOS            3. High power dissipation

Code:

    a b c

(A) 3 2 1

(B) 1 2 3

(C) 1 3 2

(D) 3 1 2

Answer: (D)

48. ______ is an “umbrella” activity that is applied throughout the software engineering process.

(A) Debugging

(B) Testing

(C) Designing

(D) Software quality assurance

Answer: (C)

49. Identify the operation which is commutative but not associative?

(A) OR

(B) NOR

(C) EX-OR

(D) NAND

Answer: (C)

50. Given a Relation POSITION (Posting No, Skill), then query to retrieve all distinct pairs of posting-nos. requiring skill is

(A) Select p.posting-No, p.posting-No From position p where p.skill= p.posting-No <p.posting-No.

(B) Select p1-posting-No, p2.posting-No from position p1, position p2 where p1.skill=p2.skill

(C) Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill=p2.skill and p1.posting-No< p2.posting-No

(D) Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill=p2.skill and p1.posting-No=p2.posting-No

Answer: (C)