Zombie process

$$ A zombie process in system programming refers to a process that has completed execution but still has an entry in the process table.

This happens when the parent process hasn't yet read the exit status of the child process $($via wait$()$ or waitpid$()$ system calls$).$ Here

are the key points about zombie processes:

$$ State: The process is in a "terminated" state but is not fully removed from the system as its parent process hasn't called wait$()$ to

collect its exit status. This state is called Z $($zombie$)$ in Unix$/$Linux systems.

$$ Parent Process Role:

The parent process is responsible for calling wait$()$ or waitpid$()$ to retrieve the termination status of its child.

If the parent process doesn$$t call these functions, the child remains in the zombie state.

$$ If you run the ps command before the parent gets terminated the output of ps will show the entry of a zombie process$($denoted by

defunct $).$ This happens because the child is no longer active but its exit code needs to be stored in case the parent subsequently calls

wait.

$2$

Zombie Process

$//$zombie$.$c

#include

#include

int main$()$

$\{$

pid$\_$t t;

t$=$fork$()$;

if$($t$==0)$

$\{$

printf$("$Child having id $\%$d

$",$getpid$())$;

$\}$

else

$\{$

printf$("$Parent having id $\%$d

$",$getpid$())$;

sleep$(15)$; $//$ Parent sleeps. Run the ps command during this time

$\}$

$\}$

$3$

Lab exercise

Q$1.$ Create a scenario where a parent has two child process C$1$ and C$2$

such that C$1$ becomes a zombie while C$2$ becomes an orphan process.

give me the code for this question.

follow the above concept. and give me the clear code and output $,$ explanation.