malloc vs calloc vs realloc

malloc vs calloc vs realloc - Wikitechy https://www.wikitechy.com/interview-questions/tag/malloc-vs-calloc-vs-realloc/ Interview Questions Tue, 14 Sep 2021 06:23:08 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png malloc vs calloc vs realloc - Wikitechy https://www.wikitechy.com/interview-questions/tag/malloc-vs-calloc-vs-realloc/ 32 32 Pick out the odd one out of the following malloc(), calloc(), free(), realloc() ? https://www.wikitechy.com/interview-questions/c/pick-out-the-odd-one-out-of-the-following-malloc-calloc-free-realloc/ https://www.wikitechy.com/interview-questions/c/pick-out-the-odd-one-out-of-the-following-malloc-calloc-free-realloc/#respond Mon, 12 Jul 2021 19:45:16 +0000 https://www.wikitechy.com/interview-questions/?p=309

Pick out the odd one out of the following malloc(), calloc(), free(), realloc() ?

free()

Explanation:

Here malloc(), calloc(), realloc() are the memory allocation function. whereas free() is used to free the memory which is allocated by the above function.
so the free() is odd term.

malloc()

The function malloc() reserves a block of memory of specified size and return a pointer of type void which can be casted into pointer of any form.
It allocates single block of memory

calloc()

calloc() allocates multiple blocks of memory each of same size and sets all bytes to zero.
It allocates space for an array elements, initializes to zero and then returns a pointer to memory.

realloc()

If suppose we assigned more or less memory than required, then we can change the size of the previously assigned memory space using realloc.

free()

The function free is used to deallocate or free the memory after the program finishes which was dynamically allocated in the program.

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