estion$1$

Consider the C program below. $($For space reasons, we are not checking error return codes, so assume

that all functions return normally.$)$

int main $()\{$

if $($fork$()==0)\{$

if $($fork$()==0)\{$

printf$("3")$;

$\}$

else $\{$

pid$\_$t pid; int status;

if $(($pid $=$ wait$($&status$))>0)\{$

printf$("4")$;

$\}$

$\}$

$\}$

else $\{$

printf$("2")$;

exit$(0)$;

$\}$

printf$("0")$;

return $0$;

$\}$

For each of the following strings, circle whether $($Y$)$ or not $($N$)$ this string is a possible output of the

program.

A$.32040$ Y N

B$.34002$ Y N

C$.30402$ Y N

D$.23040$ Y N

E$.40302$ Y