XK0-005 System Management Practice Test 7 — 15 Questions

Question 1

Based on the exhibit, the service has failed. Which of the following is the most appropriate first step to diagnose the cause of the failure?

Accepted Answer

Check the script /usr/local/bin/myservice.sh for errors and run it manually. Option B is correct because the service exited with status 1, indicating that the script /usr/local/bin/myservice.sh encountered an error. Checking the script's output or running it manually will reveal the error. Option A is wrong because restarting without investigation will likely fail again. Option C is wrong because the process exited, so journalctl for the service will show any output, but the most direct step is to run the script manually. Option D is wrong because the service is not a timer. Option E is wrong because reloading daemon is unnecessary; the unit is already loaded.

Answer

Check if the service is a timer and was triggered

Answer

Run systemctl daemon-reload to reload unit files

Answer

Restart the service using systemctl restart myservice.service

Answer

Run journalctl -u myservice.service to view logs

Question 2

An administrator needs to add a script to be executed daily. The script is placed at /etc/cron.daily/myscript. After placing the script, it does not run. Based on the exhibit, what is the most likely issue?

Accepted Answer

The script is not executable. Option A is correct because scripts in /etc/cron.daily must be executable. The exhibit shows the existing scripts have execute permission, so the new script likely does not. Option B is wrong because cron.daily runs in the system crontab and does not require an entry in /etc/crontab. Option C is wrong because anacron is used for missed runs, but cron.daily still executes. Option D is wrong because run-parts is used to execute the scripts, but missing it would affect all, not just one. Option E is wrong because the script should be owned by root like the others.

Answer

The script is owned by the wrong user

Answer

The cron daemon is not running

Answer

The script is not listed in /etc/crontab

Answer

Anacron is not installed

Question 3

A new user 'jdoe' has been added using the command 'useradd jdoe', but upon first login, the user receives a message that the home directory does not exist. Which command should the administrator run to resolve this issue while also populating the home directory with default skeleton files?

Accepted Answer

useradd -m jdoe. Option B is correct because useradd -m creates the home directory and copies skeleton files. Option A only changes the home directory entry in /etc/passwd but does not create it. Option C manually creates the directory but is not the standard tool. Option D only fixes ownership.

Answer

chown jdoe:jdoe /home/jdoe

Answer

mkdir /home/jdoe; cp /etc/skel/* /home/jdoe/

Answer

usermod -d /home/jdoe jdoe

Question 4

A Linux server is experiencing slow boot times. The administrator wants to identify which systemd services are taking the longest to start. Which command should be used?

Accepted Answer

systemd-analyze blame. Option D is correct. systemd-analyze blame lists services and their start times, sorted by time. Option A shows a summary of boot time breakdown. Option B lists units but not start times. Option C shows kernel and initrd time.

Answer

systemd-analyze time

Answer

journalctl -b -p 3

Answer

systemctl list-units --all

Question 5

An administrator is troubleshooting a web server that is running under SELinux enforcing mode. The web content is located in a non-standard directory /webfiles. Using the standard SELinux context 'httpd_sys_content_t', the files are still inaccessible. Which command will properly set the context recursively and persist across relabels?

Accepted Answer

semanage fcontext -a -t httpd_sys_content_t '/webfiles(/.*)?' ; restorecon -Rv /webfiles. Option C is correct. semanage fcontext adds a rule to the file context database, and restorecon applies it. Option A uses chcon which does not survive relabel. Option B disables SELinux. Option D only works if a rule already exists.

Answer

chcon -R -t httpd_sys_content_t /webfiles

Answer

setenforce 0

Answer

restorecon -Rv /webfiles

Question 6

A system administrator needs to configure a daily backup that creates hard links to unchanged files to save space. Which tool and option combination is most appropriate?

Accepted Answer

rsync -a --link-dest=/previous/backup /source /current/backup. Option A is correct. rsync with --link-dest creates hard links to unchanged files, enabling incremental backups. Option B copies with hard links but not incremental. Option C does not handle incremental hard links. Option D is for disk cloning.

Answer

dd if=/source of=/destination conv=sync

Answer

cp -al /source /destination

Answer

tar --hard-link --create /source > /destination/backup.tar

Question 7

A process has become unresponsive and is in a zombie state. Which action should the administrator take to remove the zombie process?

Accepted Answer

Kill the parent process of the zombie. Option D is correct. Zombie processes cannot be killed; they must be reaped by their parent. If the parent is killed, init reaps the zombie. Option A has no effect. Option B sends a continue signal. Option C is not immediately effective.

Answer

kill -18 <PID>

Answer

kill -9 <PID>

Answer

Wait for the init process to clean it up; no action needed

Question 8

An administrator needs to extend the size of a logical volume named 'lv_data' in volume group 'vg_data' by 10 GB. A new disk /dev/sdb has been added to the system. What is the correct sequence of commands?

Accepted Answer

pvcreate /dev/sdb; vgextend vg_data /dev/sdb; lvextend -L +10G /dev/vg_data/lv_data. Option A is correct. The correct order is: pvcreate to initialize the disk, vgextend to add it to the volume group, then lvextend to increase the logical volume size. Options B and D have wrong order; Option C misses pvcreate or has it after vgextend.

Answer

lvextend -L +10G /dev/vg_data/lv_data; vgextend vg_data /dev/sdb; pvcreate /dev/sdb

Answer

vgextend vg_data /dev/sdb; pvcreate /dev/sdb; lvextend -L +10G /dev/vg_data/lv_data

Answer

pvcreate /dev/sdb; lvextend -L +10G /dev/vg_data/lv_data; vgextend vg_data /dev/sdb

Question 9

A system administrator wants to schedule a script to run every Monday at 3 AM. Which cron entry is correct?

Accepted Answer

0 3 * * 1 /path/to/script.sh. Option A is correct. The cron format is minute hour day-of-month month day-of-week. 0 3 * * 1 means minute 0, hour 3, any day of month, any month, Monday. Option B has hour and minute swapped. Option C is Tuesday. Option D is the 1st of every month.

Answer

0 3 1 * * /path/to/script.sh

Answer

3 0 * * 1 /path/to/script.sh

Answer

0 3 * * 2 /path/to/script.sh

Question 10

An administrator needs to set a password expiration policy so that all users must change their password every 90 days. Which command and option accomplishes this for an existing user?

Accepted Answer

chage -M 90 <username>. Option A is correct. chage -M sets the maximum number of days a password is valid. Option B uses an invalid option for passwd. Option C sets the account expiration date. Option D sets the warning days.

Answer

usermod -e 90 <username>

Answer

passwd -x 90 <username>

Answer

chage -W 90 <username>

Question 11

A server with multiple disks is configured with RAID 5 for performance and redundancy. The administrator notices that write performance is lower than expected. Which RAID level would provide better write performance while still offering fault tolerance with the same number of disks (minimum 4)?

Accepted Answer

RAID 10. Option C is correct. RAID 10 (striping + mirroring) offers better write performance than RAID 5 because it does not require parity calculation. RAID 0 has no fault tolerance. RAID 1 has slower writes due to mirroring. RAID 6 has double parity, even slower writes.

Answer

RAID 0

Answer

RAID 6

Answer

RAID 1

Question 12

Which two commands can be used to view the SELinux context of files or processes?

Accepted Answer

ps auxZ. Options A and B are correct. ls -Z displays file contexts; ps auxZ displays process contexts. getenforce shows enforcement mode; chcon changes context; setenforce changes mode.

Answer

chcon

Answer

getenforce

Answer

setenforce

Question 13

Which three are valid systemd unit types?

Accepted Answer

socket. Options A, C, and D are correct. service, socket, and timer are standard systemd unit types. job and process are not valid unit types.

Answer

process

Answer

job

Question 14

An administrator needs to set up a new LVM volume. Which two commands are necessary in the initial setup before creating a logical volume?

Accepted Answer

vgcreate. Options A and B are correct. pvcreate initializes a physical volume, and vgcreate creates a volume group. lvcreate is used after these steps to create the logical volume. mkfs and mount are filesystem operations after the logical volume is created.

Answer

mount

Answer

lvcreate

Answer

mkfs

Question 15

The /home partition is nearly full. The administrator wants to increase the size of the home filesystem. Which action should be taken first?

Accepted Answer

Unmount the /home filesystem. Option C is correct. For safety, the filesystem should be unmounted before extending the logical volume and resizing the filesystem. Option A and B are steps after unmounting. Option D is unnecessary unless there is no free space in the volume group.

Answer

Use resize2fs on /dev/mapper/vg-home

Answer

Use lvextend to extend the logical volume

Answer

Add a new disk to the volume group

XK0-005 System Management Practice Test 7 — 15 Questions

Exhibit

XK0-005 System Management Practice Test 7 — 15 Questions

Exhibit