What is memory leak? Why it should be avoided

Ans: Memory leak occurs when programmers create a memory in heap and forget to delete it. Memory leaks are particularly serious issues for programs like daemons and servers which by definition never terminate.

/* Function with memory leak */ #include <stdlib.h>   void f() {    int *ptr = (int *) malloc(sizeof(int));      /* Do some work */      return; /* Return without freeing ptr*/ }