Zombie processes are those processes who have terminated but there entry is still there in the PROCESS TABLE.
In the above example the parent process go to sleep for 100 Time unit. And process process after failing "if" condition gets terminate as there is no other instruction left. Since it is died/ terminated but it's entry is still present in the process table. Which needs to be cleaned by parent process but parent process after spawning child process went to sleep. Thus child process will be a zombie process for 100 Time Unit.
