Practice Test Geeks(010-160) LPI Linux Essentials Practice Test
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010-160 - LPI Linux Essentials Process Management and System Monitoring Questions and Answers Flashcards

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

    Answer: uptime

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

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

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

    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.

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

    Answer: renice

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

  4. What keyboard shortcut suspends a foreground process in the terminal?

    Answer: Ctrl+Z

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

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

    Answer: jobs

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

  6. What does the `free` command display on a Linux system?

    Answer: Physical and swap memory usage

    The `free` command shows the total, used, and available physical RAM and swap space on the system.