Gate2019 cs Q27

0. The following C program is executed on a Unix/Linux system:

int main()
{
int i;
for (i=0; i<10; i++)
if (i%2 == 0) fork();
return 0;
}
The total number of child processes created is ________.

Note – Numerical Type question

Answer
Comment
Array

Option : A
Explanation :
Condition “if” will be satisfy for i = 0, 2, 4, 6, 8 only. So, “fork()” will call for 5 times.
Total number of processes created is,
= 2^{number of fork()}
There is always only one parent process of these processes and remaining will be child processes.
Hence number of child process created is,
= 2^{number of fork()} - 1
= 2⁵ - 1
= 32 - 1
= 31
So, option (A) is correct

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