Q.41 Which is not dynamic memory allocation function?

(A) malloc (B) free

(C) alloc (D) calloc

Ans: C

Three dynamic memory allocation functions are: malloc, calloc and free

Q.42 Which header file is used for screen handling function:-

(A) IO.H (B) STDLIB.H

(C) CONIO.H (D) STDIO.H

Ans: D

The header file stdio.h contains definitions of constants,macros and types, along with

function declarations for standard I/O functions.

Q.43 Choose the directive that is used to remove previously defined definition of the macro

name that follows it -

(A) # remdef (B) # pragma

(C) # undef (D) # define

Ans: C

The preprocessor directive #undef OKAY would cause the definition of OKAY to be

removed from the system.

Q.44 The output of the following is

x = ‘a’;

printf(“%d”, x);

(A) ‘a’ (B) a

(C) 97 (D) None of the above

Ans: C

The printf statement is printing ascii value of a, that is 97.

Q.45 Consider the following statement

int j, k, p;

float q, r, a;

a = j/k;

p=q/r;

If q=7.2, r=20, j=3, k=2

The value of a and p is

(A) a=1.5, p=3.6 (B) a=2, p=3

(C) a=1.5, p=4 (D) a=1, p=3

Ans: C

a=3/2=1.5 and p=q/r=7.2/2=3.6 is rounded off to 4.

Q.46 Choose the function that returns remainder of x/y -

(A) remainder( ) (B) mod( )

(C) modulus( ) (D) rem( )

Ans: C

AC05 Programming & Problem Solving Through ‘C’

AC06 Data Structures

10

modulus( ) function produces the reminder of an integer division.

Q.47 What is the output of following program:-

int q, *p, n;

q = 176; If the address of q is 2801

p = &q; and p is 2600

n = *p;

printf(“%d”, n);

(A) 2801 (B) 176

(C) 2600 (D) None of the above

Ans: B

n is assigned a the value which is present at the address of q and that value is 176.

Q.48 Consider the following statementsx

= 5;

y = x >3 ? 10 : 20;

The value of y is

(A) 10 (B) 20

(C) 5 (D) 3

Ans: A

Since x=5 is greater than 3 so y is assigned value 10. It is equivalent to if-else

statements.

Q.49 Determine which of the following is an invalid character constant.

(A) ‘\a’ (B) ‘T’

(C) ‘\0’ (D) ‘/n’

Ans: D

newline character constant is “\n” not “/n”.

Q.50 What is the name of built-in function for finding square roots?

(A) square(x) (B) sqr(x)

(C) sqrt(x) (D) No built-in function

Ans: C

sqrt(x) is a built-in function for finding square roots.