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Answer Posted / anchal
fork is a system call used for creating child processes of a
parent process.it returns the process id of the created
child process.after that pid(process id ) is checked if it
is negative,it means no child process is created,pid==0
implies the id of the newly created process and pid>0 is the
id of child process given to the parent process.the
statements following fork system call are executed by both
the parent and child process.and one more thing,the parent
and child process have the exact copy of address space but
it exist separately for the two processes.
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