CompTIA XK0-005 Exam Practice Test Instant Access

Question 1

A technician just fixed a few issues in some code and is ready to deploy the code into production. Which of the following steps should the technician take next?

ACreate a new branch using git checkout.

BPerform a git clone to pull main down.

CCreate a git pull request to merge into main.

DPerform a git pull to update the local copy of the code.

Answer : C

After fixing issues in the code, the next step is to merge these changes into the main branch.This is typically done by creating a pull request78.

Reference: 7(https://zeet.co/blog/deploy-to-production) 8(https://stackoverflow.com/questions/11833511/git-deploy-to-production)

Question 2

An administrator is running a web server in a container named web, but none of the error output is not showing. Which of the following should the administrator use to generate the errors on the container?

Adocker-compose inspect WEB

Bdocker logs WEB

Cdocker run ---name WEB ---volume/dev/stdout:/var/log/nginx/error.log

Ddocker ps WEB -f

Answer : B

Thedocker logscommand is used to fetch the logs of a container.If the error output is not showing for a running container, thedocker logscommand can be used to view these details56.

Reference: 5(https://www.docker.com/blog/how-to-fix-and-debug-docker-containers-like-a-superhero/) 6(https://stackoverflow.com/questions/33083385/getting-console-output-from-a-docker-container)

Question 3

A network administrator issues the dig ww. compti

a. org command and receives an NXDOMAIN response. Which of the following files should the administrator check first?

A/etc/resolv.conf

B/etc/hosts

C/etc/sysconfig/network-scripts

D/etc/nsswitch.conf

Answer : A

Thedigcommand uses the DNS servers listed in the/etc/resolv.conffile to resolve domain names. If thedigcommand returns an NXDOMAIN response, it means the domain does not exist according to the DNS servers used.Therefore, the administrator should check the/etc/resolv.conffile first34.

Reference: 3(https://www.linuxquestions.org/questions/linux-newbie-8/help-me-dig-status-nxdomain-4175684441/) 4(https://serverfault.com/questions/729025/what-are-all-the-flags-in-a-dig-response)

Question 4

While troubleshooting server issues, a Linux systems administrator obtains the following output:

[rootGhost ~]# total free -m used free shared buf f/cache available

Mem: 3736 3598 88 2 48 29

Swap: 2047 1824 223

Which of the following best describes the state of the system?

AThe system has consumed the system memory and swap space.

BThe system has enough free memory space.

CThe system has swap disabled.

DThe system has allocated enough buffer space.

Answer : B

The output shows that the system has a total of 3736MB of memory, of which 3598MB is free.This indicates that the system has enough free memory space12.

Reference: 1(https://phoenixnap.com/kb/swap-space) 2(https://www.baeldung.com/linux/swap-space-use)

Question 5

The development team created a new branch with code changes that a Linux administrator needs to pull from the remote repository. When the administrator looks for the branch in Git, the branch in question is not visible. Which of the following commands should the Linux administrator run to refresh the branch information?

Agit fetch

Bgit checkout

Cgit clone

Dgit branch

Answer : A

The git fetch command downloads commits, files, and refs from a remote repository into the local one. It also updates the remote-tracking branches, which are references to the state of the remote branches.By running git fetch, the administrator can see the new branch created by the development team and then use git checkout to switch to it12.

Question 6

Users are reporting that writes on a system configured with SSD drives have been taking longer than expected, but reads do not seem to be affected. A Linux systems administrator is investigating this issue and working on a solution. Which of the following should the administrator do to help solve the issue?

ARun the corresponding command to trim the SSD drives.

BUse fsck on the filesystem hosted on the SSD drives.

CMigrate to high-density SSD drives for increased performance.

DReduce the amount of files on the SSD drives.

Answer : A

TRIM is a feature that allows the operating system to inform the SSD which blocks of data are no longer in use and can be wiped internally.This helps to maintain the SSD's performance and endurance by preventing unnecessary write operations and reducing write amplification12.Running the corresponding command to trim the SSD drives, such asfstrimorblkdiscardon Linux, can help to solve the issue of slow writes by freeing up space and optimizing the SSD's internal garbage collection34.

Question 7

Which of the following will prevent non-root SSH access to a Linux server?

ACreating the /etc/nologin file

BCreating the /etc/nologin.allow file containing only a single line root

CCreating the /etc/nologin/login.deny file containing a single line +all

DEnsuring that /etc/pam.d/sshd includes account sufficient pam_nologin.so

Answer : A

This file prevents any non-root user from logging in to the system, regardless of the authentication method. The contents of the file are displayed to the user before the login is terminated.This can be useful for system maintenance or security reasons12.

CompTIA XK0-005 CompTIA Linux+ Certification Exam Practice Test