Galvin Edition 9 Exercise 3 Question 12 (Page No. 152)

Question

Including the initial parent process, how many processes are created by the program shown below-

#include <stdio.h>
#include <unistd.h>
int main()
{
int i;
for (i = 0; i < 4; i++)
fork();
return 0;
}

Answer 1

Total number of child process are created = $2^n$-1.

Here for loop executed 4 times( n=4) .

Total number of child process are created = $2^4$ -1 =16-1 = 15.