⟩ Which option of gcc makes the compiler print out each function name as it is compiled, and print some statistics about each pass when it finishes? a) -p b) -P c) -q d) -Q
d) -Q
d) -Q
By default, a Linux user falls under which group? a) staff b) others c) same as userid (UPG) d) system
Which of the following command can be used to change the user password? a) User can't change the password b) passwd c) passd d) pwd
What is a context switch? a) Kernel switches from executing one process to another. b) Process switches from kernel mode to user mode. c) Process switches from user mode to kernel mode. d) None of the above
What is the default maximum number of processes that can exist in Linux? a) 32768 b) 1024 c) 4096 d) unlimited
Which option of rmdir command will remove all directories a, b, c if path is a/b/c a) -b b) -o c) -p d) -t
How do you get parent process identification number? a) waitpid b) getpid() c) getppid() d) parentid()
Pid of init process a) 0 b) 1 c) 32767 d) none of the above
How many times printf() will be executed in the below mentioned program? main() { int i; for (i = 0; i < 4; i++) fork(); printf("my pid = %dn", getpid()); } a) 4 b) 8 c) 16 d) 32
What is output of the following program? int main() { fork(); fork(); fork(); if (wait(0) == -1) printf("leaf childn"); } a) "leaf child" will be printed 1 times b) "leaf child" will be printed 3 times c) "leaf child" will be printed 4 times d) "leaf child" will be printed 8 times
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; } a) Only child executes the exit_handler 1 and 2. b) Only parent executes the exit_handler 1 and 2. c) Both parent and child executes the exit_handler 1 and 2. d) Neither parent nor child executes the exit_handler 1 and 2.