C | Dynamic Memory Allocation | Question 6

Which of the following is true?
(A) “ptr = calloc(m, n)” is equivalent to following
ptr = malloc(m * n);

(B) “ptr = calloc(m, n)” is equivalent to following
ptr = malloc(m * n);
memset(ptr, 0, m * n);

(C) “ptr = calloc(m, n)” is equivalent to following
ptr = malloc(m);
memset(ptr, 0, m);

(D) “ptr = calloc(m, n)” is equivalent to following
ptr = malloc(n);
memset(ptr, 0, n);



Answer: (B)

Explanation: See calloc() versus malloc() for details.


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