Answer / susie

Answer :

sizeof(p) = 2, sizeof(*p) = 1, strlen(p) = 4

sizeof(a) = 5, strlen(a) = 4

Explanation:

sizeof(p) => sizeof(char*) => 2

sizeof(*p) => sizeof(char) => 1

Similarly,

sizeof(a) => size of the character array => 5

When sizeof operator is applied to an array it returns the
sizeof the array and it is not the same as the sizeof the
pointer variable. Here the sizeof(a) where a is the
character array and the size of the array is 5 because the
space necessary for the terminating NULL character should
also be taken into account.

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

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