fork() system call in c

Question

    #include 
    #include 
    int main()
    {
       fork();
       fork() && fork() || fork();
       fork();

     printf         


        

Answer 1

fork();

fork system call returns an integer: the PID of the process in the parent process and 0 in the child process. If an error occurs, no process is created and -1 is returned.

|| and && are logical operators.

If the result of the operator is know after the evaluation of their left operand, they are required to short-circuit (i.e., not evaluate the right operand):

• for || operator its right operand is not evaluated if its left operand is != 0
• for && operator its right operand is not evaluated if its leftt operand is == 0