[Sep 19, 2022] Get to the Top with XK0-004 Practice Exam Questions [Q197-Q220]

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[Sep 19, 2022] Get to the Top with XK0-004 Practice Exam Questions

Use Real XK0-004 Dumps Free Sample Questions and Practice Test Engine

CompTIA XK0-004 Exam Syllabus Topics:

Topic	Details
Topic 1	Validates the Skills of IT Professionals with Hands-On Experience Configuring
Topic 2	Monitoring, and Supporting Servers Running the Linux Operating System
Topic 3	Server (vs. client-based) Coverage, Troubleshooting and SELinux
Topic 4	Security, Kernel Modules, Storage & Visualization Device Management at an Enterprise Level
Topic 5	Git & Automation, Networking & Firewalls, Server Side & Command Line

Skills Tested

The CompTIA XK0-004 exam is performance-based and encompasses the skills of some real-world jobs. Thus, the knowledge evaluated in the final test covers one’s ability and understanding to install and set up the Linux OS as well as execute standard operations using the Linux command line and manage Linux groups and users. Also, one should know how to create, modify, find, backup, and restore data in Linux. Among other things, you should be able to configure printers and other components remotely in Linux and understand the standard networking protocols and set up procedures.

Finally, the CompTIA XK0-004 exam will want you to carry out security checks and tasks like setting up passwords, encryption, and using the basic scripts and commands to manipulate information.

NO.197 A Linux user needs to create a file named newfile in the home directory that mirrors the contents of the /
etc/resolv.conf file.
Which of the following commands would accomplish this task?

cat /etc/resolv.conf > /home/user/newfile

echo /etc/resolv.conf > /home/user/newfile

grep /etc/resolv.conf < /home/user/newfile

printf /etc/resolv.conf > /home/user/newfile

NO.198 Which of the following commands will let a Linux user know the PCI devices that are installed in the system?

cat /proc/devices/pci

lspci

lsdev

cat /proc/sys/dev

Reference:
https://opensource.com/article/19/9/linux-commands-hardware-information

NO.199 A junior systems administrator is tasked with providing the network_administratorsgroup the ability to perform sudowithout prompting for a password. Which of the following steps should the administrator perform to accomplish this task? (Choose two.)

Use visudoto edit the /etc/sudoersfile and add network_administratorsto the “wheel” group

Use vito edit the /etc/sudofile and add network_administratorsto the “wheel” group

Provide all network_administratorswith the “root” account password

Add the network_administrators ALL=(ALL) NOPASSWD: ALLdirective to the /etc/sudoersfile

Add the network_administrators=(ALL) NOEXEC: ALLdirective to the /etc/sudoersfile

NO.200 An administrator needs to see a list of the system user’s encrypted passwords. Which of the following Linux files does the administrator need to read?

/etc/shadow

/etc/skel

/etc/passwd

/etc/pw

Explanation/Reference: https://www.cyberciti.biz/faq/where-are-the-passwords-of-the-users-located-in-linux/

NO.201 The development team has automated their software build process so each time a change is submitted to the source code repository, a new software build is compiled. They are requesting that the Linux operations team look into automating the deployment of the software build into the test environment. Which of the following is the benefit to the development team for implementing deployment automation?

To ensure the build commits are also deployed to the test environment

To enable notifications when builds are deployed to the test environment

To ensure software builds in test are not accidentally deployed to production

To streamline the deployment process for deploying builds into test environments

NO.202 Ann, a user, has created a new directory and noticed that permissions on the new directory are as follows:
drwx——. 1 ann ann 0 Jun 11 08:20 work
Which of the following should the administrator do to restore default permissions for newly created directories?

Change umask value in /etc/profile.

Run chmod command to update permissions.

Modify directory ownership to ann:ann with chown.

Execute chattr command to restore default access.

NO.203 A systems administrator received a request to change the hostname to a new name. Which of the following file
configurations should be changed to fix the hostname in the server?

/etc/sysconfig/network

/etc/hosts

/etc/resolv.conf

/etc/sysconfig/nsswitch.conf

Reference https://www.tecmint.com/set-hostname-permanently-in-linux/

NO.204 A junior Linux administrator is updating local name resolution to support IPv6. The administrator issues the command cat /etc/hosts and receives the following output:
127.0.0.1 localhost
Which of the following actions should the administrator perform to accomplish this task?

Modify the /etc/hosts file, and add the ipv6 localhost entry to the file.

Modify the /etc/hosts file, and add the ::1 localhost entry to the file.

Modify the /etc/hosts file, and add the ipv4 localhost entry to the file.

Modify the /etc/hosts file, and add the 0.0.0.0 localhost entry to the file.

NO.205 A Linux administrator wants to fetch a Git repository from a remote Git server.
Which of the following is the BEST command to perform this task?

git checkout

git clone

git merge

git config

Reference:
https://git-scm.com/book/en/v2/Git-Basics-Working-with-Remotes

NO.206 A systems engineer scheduled an at job that will reboot a critical server. A developer states the processes will not complete for another three hours.
Which of the following will help the systems engineer to remove the job?

atq
atrm <at job number>

at -q
atrm <PID>

atq
atrm <PID>

at -q
atrm <at job number>

NO.207 Two specific users need access to a directory owned by root where backups are located. Which of the following commands would BEST ensure the specified users can access the backup files?

umask

chcon

chmod

setfacl

NO.208 A systems administrator suspects a process with a PID of 2864 is consuming resources at an alarming rate.
The administrator uses the command renice -n -5 -p2864, but it does not solve the issue. Which of the following commands should the administrator execute to correct the issue?

nice -n 5 -p 2864

nice -n -5 -p 2864

renice -n 10 -p 2864

renice -n -10 -p 2864

A higher value of priority actually makes the process lower priority; it means the process demands fewer system resources (and therefore is a “nicer” process). A lower priority value means the process demands more resources, possibly denying those resources to processes that are “nicer”.

NO.209 A systems administrator needs to allow the Linux server to receive HTTP connections from Internet hosts. By default, the port for HTTP connections is blocked. Which of the following rules should be added in the firewall to allow this type of connection?

firewall-cmd –zone=public –add-port=443/tcp –permanent

firewall-cmd –zone=internal –add-port=80/tcp –permanent

firewall-cmd –zone=public –add-port=80/tcp –permanent

firewall-cmd –zone=internal –add-port=443/tcp –permanent

NO.210 A Linux user needs to connect to a remote email server named mail.foo.com through the SMTP port.
Which of the following commands will accomplish this task?

traceroute mail.foo.com 25

netcat mail.foo.com 25

traceroute mail.foo.com 110

netcat mail.foo.com 110

NO.211 A Linux administrator needs the “tech” account to have the option to run elevated commands as root.
Which of the following commands would BEST meet this goal?

$ su – tech -c “/bin/bash”

# usermod -aG wheel tech

# sudo -I tech

# groupadd -u tech -g root

NO.212 A junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.
INSTRUCTIONS
Install Apache and start the service. Verify that the Apache service is running with the defaults.
Typing “help” in the terminal will show a list of relevant commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
CentOS Command Prompt

See explanation below
Explanation
Solution below.

NO.213 A Linux administrator recently changed the IP addresses of all the web servers from 10.10.50.x to 10.10.100.x.
The administrator needs to update the serverlist.txt file to reflect the change.
The file contains the following:
10:WebSvr01:10.10.50.21:Main
11:WebSvr02:10.10.50.22:Acconting
12:WebSvr03:10.10.50.23:Intranet
20:NFS01:10.10.20.21:FileServer
30:SMTP01:10.10.30.31:Email
Which of the following commands will change the IP addresses and update the files in place?

sed ‘s|.50|.100|g’ serverlist.txt

sed -g ‘s|.50|.100|a’ serverlist.txt

sed -i ‘s|.50|.100|’ serverlist.txt

sed -i ‘s|.50|.100|g’ serverlist.txt

NO.214 A technician reviews the following output:

Which of the following commands should the technical execute to ensure the system has the appropriate paging? (Select TWO.)

dd if=dev/sda5 of=/tmp bs=512

swapon /dev/sda5

Mkswap/dev/sda5

Mkfs,ext3 /dev/sda5

Lostat/dev/sda 5

Free -m/dev/sda

NO.215 A systems administrator is attempting to access a server by SSH. The Linux administrator ensures that the SSH keys on the remote server were unable to connect. The following error message is being displayed:

Which of the following needs to be changed on order for the administrator to access the server via SSH?

Password

SSL

SELinux

OpenSSH

NO.216 A company requires all servers to be configured with the BIOS on Coordinated Universal Time and the OS on Central Standard Time.
Which of the following can be used to change the time according to these requirements? (Choose two.)

localectl

LC_ALL

date

time

hwclock

crontab

NO.217 A junior systems is configuring localization option environment variables. The administrator is given a checklist of tasks with the following requirements:
View current settings of the LC_ALL environment variable only.
Modify the LANG environment variable to US English Unicode.
Given this scenario, which of the following should be performed to meet these requirements? (Choose two.)

echo $LC_ALL

locale

cat $LC_ALL

export LANG = en_US.UTF-8

export $LANG = en_US.UTF

stty

Reference:
https://www.tecmint.com/set-system-locales-in-linux/

NO.218 A Linux administrator is setting up a testing environment and needs to connect to a separate testing server using the production server name. The administrator needs to override the hostname that the DNS is returning in order to use the test environment. Which of the following commands should be run on each of the testing systems to BEST meet this goal?

# hostnamectl set-hostname “192.168.1.100 production.company.com”

# grep -i IP “${ip addr show} production.company.com” > /etc/resolv.conf

# ip addr add 192.168.1.100/24 dev eth0 && rndc reload production.company.com

# echo “192.168.1.100 production.company.com” >> /etc/hosts

NO.219 Joe, a user, creates a short shell script, shortscript.sh, and saves it in his home directory with default permissions and paths. He then attempts to run the script by typing ./shortscript.sh, but the command fails to execute.
Which of the following commands would have allowed the script to run?

chmod u+x shortscript.sh

source ./shortscript.sh

chmod 155 ~/shortscript.sh

chgrp shortscript.sh Joe

NO.220 Find the file named core and remove it from the system.
INSTRUCTIONS
Type “help” to display a list of available commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.