XK0-006 Practice Test 10 — 10 Questions

Question 1

Refer to the exhibit. A system administrator checks the status of the SSH service and sees the output shown. What is the most likely cause of the failure?

Accepted Answer

Another process is already listening on port 22.

Answer

The SSH service is disabled and needs to be enabled.

Answer

The SSH service is masked and cannot start.

Answer

The SSH configuration file has a syntax error.

Question 2

A sysadmin wants to run a containerized web application using Podman. The container needs to persist data across restarts. Which approach ensures data persistence?

Accepted Answer

Mount a host directory as a volume using -v.. Mounting a host directory as a volume using the `-v` flag (e.g., `podman run -v /host/path:/container/path ...`) ensures that data written inside the container is stored on the host filesystem. This data persists independently of the container's lifecycle, surviving container restarts, stops, or even removal. Podman, like Docker, treats volumes as external storage that outlives the container.

Answer

Run the container with --restart always.

Answer

Include the data using COPY in the Dockerfile.

Answer

Use docker commit to save changes.

Question 3

A user reports that a specific process is consuming too much CPU. The administrator needs to change the priority of the process to a lower value (nicer). Which command sequence is appropriate?

Accepted Answer

renice +10 -p <PID>. renice changes the priority of an already running process by PID.

Answer

nice -n -10 <PID>

Answer

kill -15 <PID>

Answer

chrt --idle <PID>

Question 4

Refer to the exhibit. Users report they cannot SSH to the server. Based on the logs, what is the most likely cause?

Accepted Answer

Host keys are missing or corrupted.

Answer

Firewall is blocking port 22.

Answer

The SSH service is not running.

Answer

SSH configuration has incorrect permissions.

Question 5

An administrator wants to view the contents of a compressed log file /var/log/syslog.2.gz without decompressing it to disk. Which two commands can be used to display the file contents? (Select TWO).

Accepted Answer

zcat /var/log/syslog.2.gz. zcat and gzcat (if available) decompress to stdout; some systems use zcat or gzip -dc.

Answer

gzcat /var/log/syslog.2.gz

Answer

less /var/log/syslog.2.gz

Answer

cat /var/log/syslog.2.gz

Question 6

A Linux administrator needs to change the permissions of a file to allow the owner to read and write, the group to read only, and others to have no access. Which chmod command should be used?

Accepted Answer

chmod 640 file. The symbolic representation rw-r----- corresponds to octal 640. rw- = 4+2+0=6, r-- = 4+0+0=4, --- = 0+0+0=0.

Answer

chmod 600 file

Answer

chmod 755 file

Answer

chmod 644 file

Question 7

An administrator wants to run a script every Monday at 3:00 PM using a systemd timer. Which unit file configuration is correct for the timer?

Accepted Answer

OnCalendar=Mon *-*-* 15:00:00. Systemd timer units use the `OnCalendar=` directive with a calendar event format that follows `DayOfWeek Year-Month-Day Hour:Minute:Second`. The pattern `Mon *-*-* 15:00:00` specifies every Monday at 15:00:00, where the asterisks act as wildcards for any year, month, and day. This matches the requirement to run a script every Monday at 3:00 PM.

Answer

OnCalendar=weekly Monday 15:00

Answer

ExecStart=/usr/local/bin/script.sh

Answer

OnCalendar=daily 15:00

Question 8

An administrator is troubleshooting a boot issue. The system boots to a console with limited functionality. Which systemd target should be used to bring up the system with network and multi-user support?

Accepted Answer

multi-user.target. multi-user.target provides a non-graphical multi-user system with network.

Answer

emergency.target

Answer

graphical.target

Answer

rescue.target

Question 9

A technician wants to find all files owned by user 'jane' in the /home directory. Which command accomplishes this?

Accepted Answer

find /home -type f -user jane. The find command with -user option searches for files owned by a specific user.

Answer

grep -r jane /home

Answer

ls -lR /home | grep jane

Answer

locate jane /home

Question 10

A Linux administrator wants to limit the disk space used by the /var/log directory. Which tool can be used to set disk usage quotas for a filesystem?

Accepted Answer

edquota. quota is the traditional tool; however, xfs_quota is for XFS. The question is general, so quota is correct.

Answer

repquota

Answer

quotaon

Answer

quotacheck