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Interview Questions on Storage classes in C : (3)

Question: 1

What is the storage class for variable A in below code?

int main()
{
int A;
A = 10;
printf("%d", A);
return 0;
}

(A) extern
(B) auto
(C) register
(D) static

Compiler
Expert storgeclass[Posted by: Admin | Chicago, USA]

Question: 2

Is the following statement a declaration or definition

extern int i;

(A) Declaration
(B) Definition

Compiler
Beginner storgeclass[Posted by: Admin | Chicago, USA]

Question: 3

int main()
{
extern int i;
i = 20;
printf("%d", sizeof(i));
return 0;
}

(A) 20
(B) 0
(C) Undefined reference to i
(D) Linking Error

Compiler
Beginner storgeclass[Posted by: Admin | Chicago, USA]