QUIZ ON : c - STORAGE CLASS

STORAGE CLASS

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Question No# : 01 out of 28

If storage class is not specified for a local variable, then the default class will be auto.

A. True

B. False

C. Depends on the standard

D. None of the mentioned

Question No# : 02 out of 28

Which of the following is a storage specifier?

A. enum

B. union

C. auto

D. volatile

Question No# : 03 out of 28

Automatic variables are allocated space in the form of a

A. stack

B. queue

C. priority queue

D. random

Question No# : 04 out of 28

What is the scope of an automatic variable?

A. Within the block it appears

B. Within the blocks of the block it appears

C. Until the end of program

D. Within the block it appears & Within the blocks of the block it appears

Question No# : 05 out of 28

What is the output of the following code segment?

void fn() {

int a = 10;

static int b = 20;

printf("a = %d b = %d ", ++a, ++b);

}

int main() {

fn();

return 0;

}

A. a = 11 b = 21 a = 11 b = 21

B. a = 11 b = 21 a = 12 b = 21

C. a = 11 b = 21 a = 11 b = 22

D. a = 11 b = 21 a = 12 b = 22

Question No# : 06 out of 28

Automatic variables are initialized to

A. Zero

B. Junk value

C. Nothing

D. Both Zero & Junk value

Question No# : 07 out of 28

Which of the following is not a proper storage class in ‘C’?

A. auto

B. dec

C. static

D. extern

Question No# : 08 out of 28

Global variables are

A. Internal

B. External

C. Both Internal and External

D. None of the mentioned

Question No# : 09 out of 28

What is the output of the following code?

main()

{
static int num=8;

printf(“%d ”,num=num-2);

if(num!=0) main();
}

A. 8 6 4 2

B. Infinite output

C. 6 4 2 0

D. Invalid because main function can’t call itself.

Question No# : 10 out of 28

What is the scope of an automatic variable?

A. Exist only within that scope in which it is declared

B. Cease to exist after the block is exited

C. Exist only within that scope in which it is declared & exist after the block is exited

D. All of the mentioned

Question No# : 11 out of 28

Automatic variables are allocated memory in

A. heap

B. Data segment

C. Code segment

D. stack

Question No# : 12 out of 28

Which of the following is not a proper storage class in C?

A. auto

B. dec

C. static

D. extern

Question No# : 13 out of 28

A local variable declaration with no storage class specified is by default

A. auto

B. extern

C. static

D. register

Question No# : 14 out of 28

Which of the following statement is false?

A. Constant variables need not be defined as they are declared and can be defined later

B. Global constant variables are initialized to zero

C. const keyword is used to define constant values

D. You cannot reassign a value to a constant variable

Question No# : 15 out of 28

A. outside the function

B. throughout the program

C. only in the function where it is defined

D. surrounding of that function

Question No# : 16 out of 28

The default storage class of a ‘C’ variable is

A. auto

B. static

C. extern

D. register

Question No# : 17 out of 28

What will be the output of the following code segment?

void fn() {

static int i = 10;

printf("%d ", ++i);

}

main() {

fn();

}

A. 10 10

B. 11 11

C. 11 12

D. 12 12

Question No# : 18 out of 28

Which of the following storage class supports char data type?

A. register

B. static

C. auto

D. all of the mentioned

Question No# : 19 out of 28

Automatic variables are

A. Declared within the scope of a block, usually a function

B. Declared outside all functions

C. Declared with the auto keyword

D. Declared within the keyword extern

Question No# : 20 out of 28

Which among the following is the correct syntax to declare a static variable register?

A. static register a;

B. register static a;

C. Both static register a; and register static a;

D. We cannot use static and register together

Question No# : 21 out of 28

What is the scope of an external variable?

A. Whole source file in which it is defined

B. From the point of declaration to the end of the file in which it is defined

C. Any source file in a program

D. From the point of declaration to the end of the file being compiled

Question No# : 22 out of 28

The machine registers are sometimes called

A. local variables

B. global variables

C. accumulators

D. static variables

Question No# : 23 out of 28

Which data type can be stored in register?

A. int

B. long

C. float

D. All of the mentioned

Question No# : 24 out of 28

What is the output of this C code?

#include <stdio.h>

void main()

{

static int x;

if (x++ < 2)

main();

}

A. Infinite calls to main

B. Run time error

C. Varies

D. main is called twice

Question No# : 25 out of 28

Which of the following operation is not possible in a register variable?

A. Reading the value into a register variable

B. Copy the value from a memory variable

C. Global declaration of register variable

D. All of the mentioned

Question No# : 26 out of 28

A. stack

B. registers

C. heap

D. main memory

Question No# : 27 out of 28

Automatic variables are stored in

A. stack

B. data segment

C. register

D. heap

Question No# : 28 out of 28

Identify the storage class with which & operator cannot be used.

A. register

B. static

C. extern

D. auto