UGC NET Computer Science Solved Paper II June 2007 - Part 2

11.       The following loop in ‘C’:

int i=0;

While(i++<0)i--;

(A) will terminate

(B) will go into an infinite loop

(C) will give compilation error

(D) will never be executed

Answer: B

12.       In case of right shift bitwise operator in ‘C’ language, after shifting n bits, the left most n bits:

(A) are always filled with zeroes

(B) are always filled with ones

(C) are filled with zeroes or ones and is machine dependent

(D) none of the above

Answer: C

13.       What keyword in class specification helps to hide data:

(A) Public

(B) Private

(C) Static

(D) Void

Answer: B

14.       What is the output of the following ‘C’ program?

main()

{printf(“%x”,-1>>4);}

(A) ffff

(B) 0fff

(C) 0000

(D) fff0

Answer: A

15.       Runtime polymorphism can be achieved by:

(A) Accessing virtual function through the pointer of the base class

(B) Accessing virtual function through the object

(C) The derived class

(D) None of these

Answer: A

16.       Which of the following statements is wrong?

(A) 2-phase Locking Protocols suffer from deadlocks

(B) Time-Stamp Protocols suffer from more aborts

(C) Time-Stamp Protocols suffer from cascading roll back where as 2-Phase locking Protocol do not

(D) None of these

Answer: C

17.       A recursive foreign key is a:

(A) references a relation                   

(B) references a table

(C) references its own relation         

(D) references a foreign key

Answer: C

18.       A sub class having more than one super class is called:

(A) Category

(B) Classification

(C) Combination

(D) Partial Participation

Answer: A

19.       A relation R={A,B,C,D,E,F} is given with following set of functional dependencies:

F={A→B,AD→C,B→F,A→E}. Which of the following is Candidate Key?

(A) A

(B) AC

(C) AD

(D) None of these

Answer: C

20.    Which statement is false regarding data independence?

(A) Hierarchical data model suffers from data Independence

(B) Network model suffers from data Independence

(C) Relational model suffers only from logical data Independence

(D) Relational model suffers only from physical data Independence

Answer: C

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