How the memory is mapped when fork is used?

Question

i am new to \"fork()\",I read everywhere that when a fork() is called an exact copy of current (calling) process is started.Now when I run following code ,there should be tw

Answer 1

having two different memory locations assigned to their vars and functions.

Nope; Linux implements virtual memory, meaning that each process has its own complete address space. As a result, after a fork, both processes see the same addresses for their copies of in-memory objects.

(As an aside: VM also causes code to be shared between the process in physical memory, and all data will only be copied-on-write.)