Including the initial parent process, how many processes are created by the following program? Explain….

Including the initial parent process, how many processes are created by the following program? Explain.

#include <stdio.h>

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#include <unistd.h>

int main(void)

{

// Fork a child process

fork();

// fork another child process

fork();

// and another process

fork();

return 0;

}

Expert Answer

On execution of the given code 8 processes are created.

Each fork function call creates child process to parent we becalculate number of process as order 2ⁿ where n refersto number of fork functions.

Explanation :-

Initial parent ->total processes =1.
Loop starts in parent, i == 0
Parent fork()s, creating child 1.
Now total Processes = 2 ( 1 parent 1 child)
Loop restarts in both processes, now i == 1.
Parent and child (1) fork(), creating children 2 and 3.
Now Total Processes = 4 (1 parent 3 childs )
Loop restarts in all four processes, now i == 2.
Parent and children (1 ,2, 3 )all fork(), creating children 4 to 7.
Now Total processes = 8 (1 parent 7 Childs )
Loop restarts in all eight processes, now i == 3.
i < 3 the condition false then come out from the loop.
return 0;
All processes are terminated then prrogram terminated.

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