Linux Process Management 2

Question 1

Which signal is sent to a process when you press Ctrl+C in the terminal?

Accepted Answer

SIGINT (2)

Answer

Ctrl+C sends SIGINT (signal 2), which requests the process to interrupt and terminate gracefully.

Question 2

What does the 'nice' value range from in Linux?

Accepted Answer

-20 to 19

Answer

Linux nice values range from -20 (highest priority) to 19 (lowest priority), with 0 as the default.

Question 3

Which command changes the nice value of a currently running process?

Accepted Answer

renice

Answer

renice adjusts the scheduling priority of an already-running process by its PID.

Question 4

What is a zombie process?

Accepted Answer

A terminated process whose exit status hasn't been collected by its parent

Answer

A zombie (defunct) process has exited but remains in the process table because its parent hasn't called wait() to collect its exit status.

Question 5

Which /proc entry shows the command-line arguments used to launch a process with PID 1234?

Accepted Answer

/proc/1234/cmdline

Answer

/proc/PID/cmdline contains the full command line used to start the process, with arguments separated by null bytes.

Linux Practice Test