#OS Fork () tell the output?

Question

void forkexample() 
{ 
    // child process because return value zero 
    if (fork() == 0) 
        printf("Hello from Child!\n"); 
  
    // parent process because return value non-zero. 
    else
        printf("Hello from Parent!\n"); 
} 
int main() 
{ 
    forkexample(); 
    return 0; 
} 

 

 

 

Please someone explain how things are working?

Comments

check the links which is provided in the answer https://gateoverflow.in/242749/self-doubt

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check this also https://gateoverflow.in/145738/self-doubt-os-fork?show=145738#q145738

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@shaik, thank you bhai, I'll see those links.

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output will be :

Hello from child!

Hello from parent!

or

Hello from parent!

Hello from child!

Answer 1

OUTPUT:

Hello from child!

Hello from parent!

or

Hello from parent!

Hello from child!

Because we dont know wheather parent executed first or child.