Answer Posted / rajeev shukla

" " is generaly used to print the value of variable
and ' ' is used to print same as given text...
for ex:-
f=rajeev
echo "file name is $f"
output:- file name is rajeev.
and
echo ' file name is $f'
output:- file name is $f

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When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

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