Question

Assertion (A): If ‘char a[10];’ is defined in one file and ‘extern char *a;’ is declared in another file then it does not work.

Reason (R): The declaration ‘extern char *a;’ does not declare an array and therefore does not match the actual definition.

1. Both (A) and (R) are true and (R) is the correct explanation of (A)
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
3. (A) is true, but (R) is false
4. (A) is false, but (R) is true

Answer 1

Correct Answer - Option 1 : Both (A) and (R) are true and (R) is the correct explanation of (A)

extern:

extern keyword extends the function’s visibility to the whole program, the function can be called anywhere in any of the files of the whole program, provided those files contain a declaration of the function

extern char *a → is a pointer of type character with visibility to the whole program

Character array:

Character array declaration of size 10: char a[10]

Explanation:

If ‘char a[10];’ is defined in one file and ‘extern char *a;’ is declared in another file then it does not work. because the declaration ‘extern char *a;’ does not declare an array and therefore does not match the actual definition.