Please explain the answer please explain

Question: 1. What is printed by the following program assuming that the fork and exec are both completed successfully and that the echo program produces no output? Choose all possible answers. [ ;; means new line in the answers shown]

main(){

pid_t pid;

if ((pid=fork()) == -1) {

printf(stderr, Spongebob: %s , strerror(errno));

return EXIT_FAILURE;

} else if (pid== 0) {

execl(/bin/echo, /bin/echo, , NULL);

printf(Sammy );

}

printf("oh No!" );

wait();

printf("Jane here ");

return EXIT_SUCCESS;

}

The following program code snippet (part of a program) is to be used for the next 2 questions.

Assume that initially the process ID executing this code is 2394, and the PID always increases sequentially by 1. For example, the first time this process calls fork() the PID of the child is 2395. You can also assume no other processes in the system are calling fork() after this program starts to execute.

:

for (i = 0 i<4 i++) { if (fork()) { break } printf ("PID: %d, i = %d ", getpid(), i)

}

Question 2: In the above program, how many processes execute the code in this program snippet?

Question 3: For the above program, the 'print statement' produces output that includes the PID of the process . Which of the following includes PIDs printed by the program during its execution.