Real CompTIA Linux+ XK0-004 Practice Test V8.02

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administrator Answer Linux safer easier file system
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Exam    :   XK0-004 
 
 
 
Title     :     
 
 
 
 
 
 
Version  :   V8.02 
 
 
 
 
 
 
 
 
 
 
 
CompTIA Linux+ 
Certification Exam 
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1.Which of the following would be the BEST solution for a systems administrator to access the graphical 
user environment of a Linux machine remotely? 
A. VNC 
B. KDE 
C. X11 
D. RPC 
Answer: A 
 
2.A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp 
directory and is getting the following error No space left on device. The support engineer checks the /tmp 
directory, and it has 20GB of free space. 
Which of the following BEST describes a possible cause for this error? 
A. The /tmp directory is not mounted. 
B. The filesystem is formatted with a 4MB block size. 
C. the filesystem ran out of inodes. 
D. The /tmp directory has been set with an immutable attribute. 
Answer: C 
 
3.Which of the following is the BEST reason for not storing database files in the /var directory? 
A. The /var filesystem is not fast enough for database files. 
B. The number of files in /var is limited by the available inodes. 
C. Files in /var do not have strict file permissions. 
D. If log files fill up /var, it might corrupt the database. 
Answer: D 
 
4.CORRECT TEXT 
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 
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Answer: 
See explanation below 
 
5.DRAG DROP 
 
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The lead Linux has added a disk, /dev/sdd, to a VM that is running out of disk space. Place the following 
steps in the correct order from first (1) to last (4) to add the disk to the existing LVM. 
 
Answer: 
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6.An administrator receives a warning about a file system filling up, and then identifies a large file located 
at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the file system. 
Which of the following commands would BEST assists the administrator in identifying the problem? 
A. lsof | grep largelogfile 
B. pkill /tmp/largelogfile 
C. pgrep largelogfile 
D. ps –ef | grep largelogfile 
Answer: A 
 
7.Which of the following can be used to boot a DVD from a remote device to initialize a Linux system 
setup on bare metal hardware as if it is a local DVD? 
A. UEFI 
B. PXE 
C. NFS 
D. GRUB 
Answer: A 
 
8.After starting a long-running script, a systems administrator needs to verify the frequency of what is 
filling up the /var partition and kill it because it is consuming too much space. 
Which of the following is the correct sequence given only a terminal is available? 
A. 1. CTRL-C2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-Z 
B. 1. CTRL-C2. fg3. watch df /var4. CTRL-Z5. bg6. CTRL-Z 
C. 1. CTRL-Z2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-C 
D. 1. CTRL-Z2. bg3. watch df /var4. CTRL-Z5. fg6. CTRL-C 
Answer: D 
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9.A Linux administrator must identify a user with high disk usage. 
The administrator runs the # du –s /home/* command and gets the following output: 
 
Based on the output, User3 has the largest amount of disk space used. To clean up the file space, the 
administrator needs to find out more information about the specific files that are using the most disk 
space. 
Which of the following commands will accomplish this task? 
A. df –k /home/User/files.txt 
B. du –a /home/User3/* 
C. du –sh /home/User/ 
D. find . –name /home/User3 -print 
Answer: C 
 
10.A Linux server has multiple IPs. A Linux administrator needs to verify if the HTTP server port is bound 
to the correct IP. 
Which of the following commands would BEST accomplish this task? 
A. route 
B. host 
C. nslookup 
D. netstat 
E. ip 
Answer: D 
 
11.A systems administrator needs to append output of ls –lha /opt command to the contents of a test.txt 
file. 
Which of the following commands will accomplish this? 
A. ls –lha /opt > test.txt 
B. ls –lha /opt < test.txt 
C. ls –lha /opt >> test.txt 
D. ls –lha /opt << test.txt 
Answer: C 
 
12.A Linux administrator needs to remotely update the contents of the www.comptia.org/contacts URL. 
Which of the following commands would allow the administrator to download the current contents of the 
URL before updating? 
A. curl www.comptia.org/contacts 
B. dig www.comptia.org/contacts 
C. apt-get www.comptia.org/contacts 
D. yum list www.comptia.org/contacts 
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Answer: A 
 
13.Which of the following BEST describes running on a Linux system? 
A. Containers only need the namespaces functionally to run on a Linux system available since kernel 2.6. 
B. Containers need a hypervisor to run a Linux system. Cgroups namespaces are functionalities used for 
the kernel but not for running containers. 
C. Containers only need the cgroups functionality for running on a Linux system. Namespaces is not a 
Linux kernel functionality needed for creating and managing containers. 
D. Containers use the cgroups and namespaces functionalities to isolate processes and assign hardware 
resources to each of those isolated processes. 
Answer: D 
 
14.A networked has been crashing intermittently. A Linux administrator would like to write a shell script 
that will attempt to ping the server and email an alert if the server fails to respond. The script will later be 
scheduled via cron job. 
Which of the following scripts would BEST accomplish this task? 
 
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A. Option A 
B. Option B 
C. Option C 
D. Option D 
Answer: D 
 
15.A Linux administrator is testing connectivity to a remote host on a shared terminal. The administrator 
wants to allow other users to access the terminal while the command is executing. 
Which of the following commands should the administrator use? 
A. bg ping remotehost 
B. fg ping remotehost 
C. ping remotehost < results 
D. ping remotehost & 
Answer: C 
 
16.A Linux administrator needs to switch from text mode to GUI. 
Which of the following runlevels will start the GUI by default? 
A. Runlevel 3 
B. Runlevel 4 
C. Runlevel 5 
D. Runlevel 6 
Answer: C 
 
17.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.) 
A. echo $LC_ALL 
B. locale 
C. cat $LC_ALL 
D. export LANG = en_US.UTF-8 
E. export $LANG = en_US.UTF 
F. stty 
Answer: B,D 
 
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18.An administrator needs to change the IP address on a server remotely. After updating the configuration 
files, a network restart is needed. 
However, the administrator fears that when the network connection drops, the network restart script will 
be killed before the new IP address has been set. 
Which of the following commands would prevent the script from being killed? 
A. nohup service network restart 
B. service network restart & 
C. echo “service network restart” | at now 
D. dg service network restart 
Answer: A 
 
19.A Linux administrator is testing a new web application on a local laptop and consistently shows the 
following 403 errors in the laptop’s logs” 
 
The web server starts properly, but an error is generated in the audit log. 
Which of the following settings should be enabled to prevent this audit message? 
A. httpd_can_network_connect = 1 
B. httpd_enable_scripting = 1 
C. httpd_enable_homedirs = 1 
D. httpd_enable_cgi = 1 
Answer: A 
 
20.Which of the following BEST describes the purpose of the X11 system? 
A. X11 provides graphical display capabilities 
B. X11 provides command line capabilities 
C. X11 provides networking capabilities 
D. X11 provides telephony capabilities. 
Answer: A 
 
21.An administrator is analyzing a Linux server which was recently hacked. 
Which of the following will the administrator use to find all unsuccessful login attempts? 
A. nsswitch 
B. faillock 
C. pam_tally2 
D. passwd 
Answer: C 
 
22.A junior administrator needs to unload an older video kernel module. 
Which of the following commands would BEST accomplish this task? 
A. modprobe 
B. insmod 
C. rmmod 
D. chmod 
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Answer: A 
 
23.An administrator is attempting to block SSH connections to 192.168.10.24 using the Linux firewall. 
After implementing a rule, a connection refused error is displayed when attempting to SSH to 
192.168.10.24. 
Which of the following rules was MOST likely implemented? 
A. iptables –A –p tcp –d 192.168.10.24 –dropt 22 –j REJECT 
B. iptables –A –p tcp –d 192.168.10.24 –dropt 22 –j DROP 
C. iptables –A –p tcp –d 192.168.10.24 –dropt 22 –j FORWARD 
D. iptables –A –p tcp –d 192.168.10.24 –dropt 22 –j REFUSE 
Answer: A 
 
24.A junior Linux administrator is setting up system-wide configuration settings. The goal is to ensure the 
PATH environment variable includes the following locations for all users who log into a Linux system. 
 
The administrator issues the following commands at the terminal: 
 
Respectively, the output of these commands is as follows: 
 
Given this output, which of the following would be the BEST action for the administrator to perform to 
address this issue? 
A. Update the /etc/profile.d file using a text editor, navigate to the PATH element add the missing locations, 
and run the bash_completion.sh script to update the changes. 
B. Update the /etc/profile file using a text editor, navigate to the PATH element, add the missing locations 
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and run the . /etc/profile command to update the changes. 
C. Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing 
locations, and reboot to update the changes. 
D. Update the /etc/profile file using a text editor navigate to the PATH element, add the missing locations, 
and restart the bash process to update the changes. 
Answer: B 
 
25.A Linux systems administrator needs to provision multiple web servers into separate regional 
datacenters. The systems architect has instructed the administrator to define the server infrastructure 
using a specific tool that consumes a text-based file. 
Which of the following is the BEST reason to do this? 
A. To document the infrastructure so it can be included in the system security plan 
B. To ensure the administrator follows the planning phase of the system development life cycle 
C. To define the infrastructure so it can be provisioned consistently with minimal manual tasks 
D. To validate user requirements have been met within each regional datacenter for compliance 
Answer: B