A Linux administrator is reviewing changes to a configuration file that includes the following section:

The Linux administrator is trying to select the appropriate syntax formatter to correct any issues with the configuration file. Which of the following should the syntax formatter support to meet this goal?

• A.Markdown
• B.XML
• C.JSON
• D.YAML

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A cloud engineer needs to remove all dangling images and delete all the images that do not have an associated container. Which of the following commands will help to accomplish this task?

• A.docker push images -a
• B.docker images prune -a
• C.docker rmi -a images
• D.docker images rmi --all

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A Linux systems administrator is setting up a new web server and getting 404 - NOT FOUND errors while trying to access the web server pages from the browser. While working on the diagnosis of this issue, the Linux systems administrator executes the following commands:

Which of the following commands will BEST resolve this issue?

• A.setenforce 0
• B.setsebool -P httpd_can_network_connect_db on
• C.restorecon -R -v /var/www/html
• D.sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

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A development team asks an engineer to guarantee the persistency of journal log files across system reboots. Which of the following commands would accomplish this task?

• A.grep -i auto /etc/systemd/journald.conf && systemctl restart systemd-journald.service
• B.cat /etc/systemd/journald.conf | awk '(print $1,$3)'
• C.journalctl --list-boots && systemctl restart systemd-journald.service
• D.sed -i 's/auto/persistent/g' /etc/systemd/journald.conf && sed -i 'persistent/s/' #//q' /etc/systemd/journald.conf

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A Linux administrator was notified that a virtual server has an I/O bottleneck. The Linux administrator analyzes the following output:

Given there is a single CPU in the sever, which of the following is causing the slowness?

• A.The system is running out of swap space.
• B.The memory is exhausted.
• C.The processes are paging.
• D.The CPU is overloaded.

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