C - Design your own free( ) function

Question

Today, I appeared for an interview and the interviewer asked me this,

1. Tell me the steps how will you design your own f

Answer 1

The knowledge of working of malloc() is necessary to implement free(). You can find a implementation of malloc() and free() using the sbrk() system call in K&R The C Programming Language Chapter 8, Section 8.7 "Example--A Storage Allocator" pp.185-189.