Declarations and Initializations

Q1:
Is there any difference between following declarations?

1 : extern int fun();

2 : int fun();

A

No difference, except extern int fun(); is probably in another file

B Both are identical

C None of these

D

int fun(); is overrided with extern int fun();

ANS:A - Both are identical

extern int fun(); declaration in C is to indicate the existence of a global function and it is defined externally to the current module or in another file. int fun(); declaration in C is to indicate the existence of a function inside the current module or in the same file.

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