Storage Class MCQs

Question 1

What is the default storage class for global variables?

Accepted Answer

extern

Answer

auto

Answer

static

Answer

register

Question 2

Which storage class is used for local variables?

Accepted Answer

auto

Answer

register

Answer

static

Answer

extern

Question 3

What is the primary purpose of the 'static' storage class?

Accepted Answer

Preserve value

Answer

Extend scope

Answer

Allocate memory

Answer

Register access

Question 4

Which storage class specifies automatic storage duration?

Accepted Answer

auto

Answer

static

Answer

extern

Answer

register

Question 5

When does a 'register' storage class make sense to use?

Accepted Answer

For function args

Answer

For global vars

Answer

For local vars

Answer

For static vars

Question 6

What is the significance of the 'extern' storage class?

Accepted Answer

External linkage

Answer

Local scope

Answer

Automatic alloc.

Answer

Static duration

Question 7

Which storage class allocates memory and retains its value between function calls?

Accepted Answer

static

Answer

extern

Answer

auto

Answer

register

Question 8

What is the maximum scope of a variable with 'static' storage class?

Accepted Answer

File scope

Answer

Function scope

Answer

Block scope

Answer

No scope (invalid)

Question 9

What is the storage duration of a variable with 'auto' storage class?

Accepted Answer

Automatic

Answer

Static

Answer

Register

Answer

External