CompTIA Linux+ Certification Exam (XK0-006) Free Practice Test

Question 1

A Linux administrator needs to analyze a compromised disk for traces of malware. To complete the analysis, the administrator wants to make an exact, block-level copy of the disk. Which of the following commands accomplishes this task?

A. cpio -i /dev/sdc -ov /tmp/image

B. tar cvzf /tmp/image /dev/sdc

C. dd if=/dev/sdc of=/tmp/image bs=8192

D. cp -rp /dev/sdc/* /tmp/image

Correct Answer: C

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Question 2

A systems administrator is helping to secure a new web application. During the tests, the administrator obtains the following output to validate the application:
SSL connection using TLSv1.2 / ECDHE-RSA-AES256-GCM-SHA384
ALPN, server accepted to use http/1.1
Server certificate:
subject: CN=*.newapp.comptia.org
start date: Jan 17 00:00:00 2024 GMT
expire date: Feb 16 23:59:59 2034 GMT
issuer: C=US; O=Comptia; OU=IT Security; CN=ca1.comptia.org
SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway.
Which of the following explains the validation results?

A. The certificate was not signed by a trusted authority, which was forcefully ignored during the tests.

B. The certificate is a wildcard certificate that is highly insecure and should never be used.

C. The certificate uses an outdated algorithm and should be replaced with a more secure one.

D. The certificate was only issued for one month, is already expired, and needs to be replaced.

Correct Answer: A

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Question 3

Users cannot access a server after it has been restarted. At the server console, the administrator runs the following commands;

Which of the following is the cause of the issue?

A. The DNS entry does not have a valid IP address.

B. The SSH service has not been allowed on the firewall.

C. The wrong protocol is being used to connect to the web server.

D. The server load average is too high.

Correct Answer: B

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Question 4

An administrator wants to start an Ubuntu terminal in a container. Which of the following will allow the administrator to complete the task?

A. containerd /usr/bin/sh ubuntu

B. runc exec -it ubuntu

C. docker run -it ubuntu

D. podman pull ubuntu /bin/bash

Correct Answer: C

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Question 5

Which of the following does dmesg display?

A. Window manager warnings

B. " Session closed " messages

C. Incorrect login attempts

D. USB device connections

Correct Answer: D

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Question 6

(Partial question reconstructed from visible content)

A. (not visible)

B. smb.conf

C. (not visible)

D. pam.conf

Correct Answer: D

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Question 7

An administrator added a new disk to expand the current storage. Which of the following commands should the administrator run first to add the new disk to the LVM?

A. pvresize

B. pvcreate

C. vgextend

D. lvextend

Correct Answer: B

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Question 8

An administrator wants to search a file named myFile and look for all occurrences of strings containing at least five characters, where characters two and five are i, but character three is not b. Which of the following commands should the administrator execute to get the intended result?

A. grep .a*^b-.a myFile

B. grep .a., [a] myFile

C. grepa^b*a myFile

D. grep .i[^b].i myFile

Correct Answer: D

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Question 9

A Linux administrator attempts to unmount the local filesystem /data in order to mount a new volume.
However, the administrator receives the following error message:
umount: /data: target is busy
Which of the following commands should the administrator run to resolve the issue?

A. stat -f /data

B. fuser -mk /data

C. tree -g /data

D. ls -ld /data

Correct Answer: B

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Question 10

A Linux administrator needs to change the server name to comptia1. Which of the following commands should the administrator use?

A. systemctl daemon-reload -H comptia1

B. hostnamectl set-hostname comptia1

C. export HOSTNAME=comptia1

D. echo " comptia1 " > > /etc/resolv.conf

Correct Answer: B

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Question 11

A Linux administrator observes low network throughput. The administrator gathers the following output:
$ ip link show eth0
eth0: < BROADCAST,MULTICAST,UP,RUNNING > mtu 9000 ...
$ ping -s 1472 -M do 192.168.10.2
PING 192.168.10.2(192.168.10.2) 1472(1500) bytes of data.
From 10.10.9.72 icmp_seq=1 frag needed and DF set
Which of the following is the cause of the low network throughput?

A. Hardware limitations

B. Driver issue

C. MTU mismatch

D. Duplex configuration issue

Correct Answer: C

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Question 12

Which of the following most accurately describes a webhook?

A. An HTTP-based callback function

B. A means to transmit sensitive information between systems

C. An SNMP-based API for network device monitoring

D. An authentication method for web-server communication

Correct Answer: A

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CompTIA Linux+ Certification (XK0-006) Free Practice Test