010-160 010-160 - LPI Linux Essentials Process Management and System Monitoring Questions and Answers 2

Question 1

Which command shows how long the Linux system has been running since its last boot?

Accepted Answer

uptime

Answer

The `uptime` command displays the current time, how long the system has been running, the number of logged-in users, and load averages.

Question 2

What does the load average represent in the output of the `uptime` command?

Accepted Answer

Average number of processes waiting for CPU over 1, 5, and 15 minutes

Answer

Load average reflects the average number of processes in the run queue (waiting for or using CPU) over the past 1, 5, and 15 minutes.

Question 3

Which command can be used to change the priority of an already-running process?

Accepted Answer

renice

Answer

The `renice` command adjusts the scheduling priority (niceness) of a process that is already running, identified by its PID.

Question 4

What keyboard shortcut suspends a foreground process in the terminal?

Accepted Answer

Ctrl+Z

Answer

Pressing Ctrl+Z sends the SIGTSTP signal to the foreground process, suspending it and returning control to the shell.

Question 5

Which command lists all background and suspended jobs in the current shell session?

Accepted Answer

jobs

Answer

The `jobs` command displays all jobs (background and suspended processes) started in the current shell, along with their job IDs and status.

(010-160) LPI Linux Essentials Practice Test