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



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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