fork and exec

Question

what is the output of the following program?

int ret = fork();
if(ret == 0) {
    exec(some_binary); // this call fails
    printf("child ");
}else {
    wait();
    printf("parent\n");
}

 

1. Runtime Error

2. child

3. parent

4. child parent

Comments

$4$ ?

Answer 1

Runtime Error

wait() system call needs an argument "status" so its syntax should be like wait(&status).