MCQ Tutorial - Linux->Process

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66.) What is the output of the below code?

    void exit_handler1();
    void exit_handler2();
    int main() {
        int pid;
        atexit(exit_handler1);
        atexit(exit_handler2);
        pid = fork();
        if(pid == 0) {
           _exit(0);
        } else {
            sleep(2);
            exit(0);
        }
        return 0;
    }

Options are:

A.) Neither parent nor child executes the exit_handler 1 and 2.

B.) Only parent executes the exit_handler 1 and 2.

C.) Only child executes the exit_handler 1 and 2.

D.) Both parent and child executes the exit_handler 1 and 2.

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67.) What is output of the following program?

    int main() {
        fork();
        fork();
        fork();
        if (wait(0) == -1)
            printf("leaf child
");
    }

Options are:

A.) "leaf child" will be printed 8 times

B.) "leaf child" will be printed 4 times

C.) "leaf child" will be printed 1 times

D.) "leaf child" will be printed 3 times

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68.) Return value of fork() system call can be:

Options are:

A.) -1 or <0 or 0

B.) -1 or 0

C.) True or false

D.) -1 or >0 or 0

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69.) Solaris System class priority is

Options are:

A.) 0-59

B.) 160-169

C.) 60-99

D.) 100-159

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70.) Which one of the following command creates the executable file a.out?

Options are:

A.) gcc -o mcqtutorial.c

B.) gcc -o a.out

C.) gcc a.out

D.) gcc mcqtutorial.c

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