EMT Practice Test

1. Question Content...

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Question1: An administrator recently updated the BIND software package and would like to review the default configuration that shipped with this version. Which of the following files should the administrator review?

Question2: A junior Linux administrator is tasked with installing an application. The installation guide states the application should only be installed in a run level 5 environment.

Which of the following commands would ensure the server is set to runlevel 5?

Question3: A Linux administrator recently downloaded a software package that is currently in a compressed file. Which of the following commands will extract the files?

Question4: A systems administrator is installing various software packages using a pack-age manager. Which of the following commands would the administrator use on the Linux server to install the package?

Question5: A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a reposito-ry to share with the systems team. A junior Linux administrator needs to re-trieve the scripts and make them available on a local workstation. Which of the following Git commands should the junior Linux administrator use to accom-plish this task?

Question6: A cloud engineer needs to remove all dangling images and delete all the images that do not have an associated container. Which of the following commands will help to accomplish this task?

Question7: A developer has been unable to remove a particular data folder that a team no longer uses. The developer escalated the issue to the systems administrator. The following output was received:

Which of the following commands can be used to resolve this issue?

Question8: A systems administrator needs to verify whether the built container has the app.go file in its root directory.
Which of the following can the administrator use to verify the root directory has this file?

Question9: A DevOps engineer is working on a local copy of a Git repository. The engineer would like to switch from the main branch to the staging branch but notices the staging branch does not exist. Which of the following Git commands should the engineer use to perform this task?

Question10: Joe, a user, is unable to log in to the Linux system. Given the following output:

Which of the following commands would resolve the issue?

Question11: A Linux administrator needs to create a symlink for /usr/local/bin/app-a, which was installed in
/usr/local/share/app-a. Which of the following commands should the administrator use?

Question12: A systems administrator creates a public key for authentication. Which of the following tools is most suitable to use when uploading the key to the remote servers?

Question13: Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?

Question14: User1 is a member of the accounting group. Members of this group need to be able to execute but not make changes to a script maintained by User2. The script should not be accessible to other users or groups. Which of the following will give proper access to the script?

Question15: A Linux administrator is troubleshooting an issue in which users are not able to access
https://portal.comptia.org from a specific workstation. The
administrator runs a few commands and receives the following output:

Which of the following tasks should the administrator perform to resolve this issue?

Question16: A Linux administrator copied a Git repository locally, created a feature branch, and committed some changes to the feature branch. Which of the following Git actions should the Linux administrator use to publish the changes to the main branch of the remote repository?

Question17: A Linux administrator needs to remove software from the server. Which of the following RPM options should be used?

Question18: A systems administrator is receiving tickets from users who cannot reach the application app that should be listening on port 9443/tcp on a Linux server.
To troubleshoot the issue, the systems administrator runs netstat and receives the following output:

Based on the information above, which of the following is causing the issue?

Question19: A systems administrator is tasked with changing the default shell of a system account in order to disable iterative logins. Which of the following is the best option for the administrator to use as the new shell?

Question20: Which of the following enables administrators to configure and enforce MFA on a Linux system?

Question21: A Linux administrator reviews a set of log output files and needs to identify files that contain any occurrence of the word denied. All log files containing entries in uppercase or lowercase letters should be included in the list. Which of the following commands should the administrator use to accomplish this task?

Question22: Users have been unable to save documents to /home/tmp/temp and have been receiving the following error:
Path not found
A junior technician checks the locations and sees that /home/tmp/tempa was accidentally created instead of
/home/tmp/temp. Which of the following commands should the technician use to fix this issue?

Question23: A DevOps engineer needs to download a Git repository from https://git.company.com/admin/project.git.
Which of the following commands will achieve this goal?

Question24: Which of the following tools is BEST suited to orchestrate a large number of containers across many different servers?

Question25: In order to copy data from another VLAN, a systems administrator wants to temporarily assign IP address
10.0.6 5/24 to the newly added network interface enp1s0f1. Which of the following commands should the administrator run to achieve the goal?

Question26: A Linux administrator wants to prevent the httpd web service from being started both manually and automatically on a server. Which of the following should the administrator use to accomplish this task?

Question27: A systems administrator wants to back up the directory /data and all its contents to /backup/data on a remote server named remote. Which of the following commands will achieve the desired effect?

Question28: An engineer needs to insert a character at the end of the current line in the vi text editor. Which of the following will allow the engineer to complete this task?

Question29: The administrator comptia is not able to perform privileged functions on a newly deployed system. Given the following command outputs:

Which of the following is the reason that the administrator is unable to perform the assigned duties?

Question30: While inspecting a recently compromised Linux system, the administrator identified a number of processes that should not have been running:

Which of the following commands should the administrator use to terminate all of the identified processes?

Question31: A Linux administrator is providing a new Nginx image from the registry to local cache. Which of the following commands would allow this to happen?

Question32: A Linux user reported the following error after trying to connect to the system remotely:
ssh: connect to host 10.0.1.10 port 22: Resource temporarily unavailable The Linux systems administrator executed the following commands in the Linux system while trying to diagnose this issue:

Which of the following commands will resolve this issue?

Question33: An administrator needs to get network information from a group of statically assigned workstations before they are reconnected to the network. Which of the following should the administrator use to obtain this information?

Question34: A development team asks an engineer to guarantee the persistency of journal log files across system reboots.
Which of the following commands would accomplish this task?

Question35: A user is unable to remotely log on to a server using the server name server1 and port 22. The Linux engineer troubleshoots the issue and gathers the following information:
Which of the following is most likely causing the issue?

Question36: A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding.
Which of the following commands is the correct way to accomplish this task?

Question37: A Linux systems administrator receives reports from various users that an application hosted on a server has stopped responding at similar times for several days in a row. The administrator logs in to the system and obtains the following output:
Output 1:

Output 2:

Output 3:

Which of the following should the administrator do to provide the BEST solution for the reported issue?

Question38: A systems administrator received a notification that a system is performing slowly. When running the top command, the systems administrator can see the following values:

Which of the following commands will the administrator most likely run NEXT?

Question39: An administrator has source code and needs to rebuild a kernel module. Which of the following command sequences is most commonly used to rebuild this type of module?

Question40: A developer reported an incident involving the application configuration file /etc/httpd/conf/httpd.conf that is missing from the server. Which of the following identifies the RPM package that installed the configuration file?

Question41: Which of the following tools is commonly used for creating CI/CD pipelines?

Question42: After listing the properties of a system account, a systems administrator wants to remove the expiration date of a user account. Which of the following commands will accomplish this task?

Question43: A systems administrator wants to delete app . conf from a Git repository. Which of the following commands will delete the file?

Question44: Some servers in an organization have been compromised. Users are unable to access to the organization's web page and other services. While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

Which of the following commands will remediate and help resolve the issue?

Question45: A Linux administrator needs to create an image named sda.img from the sda disk and store it in the /tmp directory. Which of the following commands should be used to accomplish this task?

Question46: A systems administrator has been unable to terminate a process. Which of the following should the administrator use to forcibly stop the process?

Question47: A Linux administrator is troubleshooting SSH connection issues from one of the workstations.
When users attempt to log in from the workstation to a server with the IP address 104.21.75.76, they receive the following message:

The administrator reviews the information below:


Which of the following is causing the connectivity issue?

Question48: An administrator deployed a Linux server that is running a web application on port 6379/tcp.
SELinux is in enforcing mode based on organization policies.
The port is open on the firewall.
Users who are trying to connect to a local instance of the web application receive Error 13, Permission denied.
The administrator ran some commands that resulted in the following output:

Which of the following commands should be used to resolve the issue?

Question49: A Linux administrator is adding a new configuration file to a Git repository. Which of the following describes the correct order of Git commands to accomplish the task successfully?

Question50: A Linux administrator is scheduling a system job that runs a script to check available disk space every hour.
The Linux administrator does not want users to be able to start the job. Given the following:

The Linux administrator attempts to start the timer service but receives the following error message:

Which of the following is MOST likely the reason the timer will not start?

Question51: A Linux administrator modified the SSH configuration file. Which of the following commands should be used to apply the configuration changes?

Question52: A systems administrator is compiling a report containing information about processes that are listening on the network ports of a Linux server. Which of the following commands will allow the administrator to obtain the needed information?

Question53: A Linux administrator found many containers in an exited state. Which of the following commands will allow the administrator to clean up the containers in an exited state?

Question54: A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time. Which of the following files can be used to set a different port value for that host?

Question55: Ann, a security administrator, is performing home directory audits on a Linux server. Ann issues the su Joe command and then issues the Is command. The output displays files that reside in Ann's home directory instead of Joe's. Which of the following represents the command Ann should have issued in order to list Joe's files?

Question56: A Linux administrator has installed a web server, a database server, and a web application on a server. The web application should be active in order to render the web pages. After the administrator restarts the server, the website displays the following message in the browser: Error establishing a database connection. The Linux administrator reviews the following relevant output from the systemd init files:

The administrator needs to ensure that the database is available before the web application is started. Which of the following should the administrator add to the HTTP server .service file to accomplish this task?

Question57: A Linux administrator is tasked with creating resources using containerization. When deciding how to create this type of deployment, the administrator identifies some key features, including portability, high availability, and scalability in production. Which of the following should the Linux administrator choose for the new design?

Question58: A systems administrator is troubleshooting connectivity issues and trying to find out why a Linux server is not able to reach other servers on the same subnet it is connected to. When listing link parameters, the following is presented:

Based on the output above, which of following is the MOST probable cause of the issue?

Question59: Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

Question60: Which of the following technologies provides load balancing, encryption, and observability in containerized environments?

Question61: A systems administrator is tasked with preventing logins from accounts other than root, while the file
/etc/nologin exists. Which of the following PAM modules will accomplish this task?

Question62: Which of the following is a function of a bootloader?

Question63: Due to low disk space, a Linux administrator finding and removing all log files that were modified more than
180 days ago. Which of the following commands will accomplish this task?

Question64: A Linux administrator was notified that a virtual server has an I/O bottleneck. The Linux administrator analyzes the following output:

Given there is a single CPU in the sever, which of the following is causing the slowness?

Question65: A new application container was built with an incorrect version number. Which of the following commands should be used to rename the image to match the correct version 2.1.2?

Question66: A Linux administrator needs to create a new cloud.cpio archive containing all the files from the current directory. Which of the following commands can help to accomplish this task?

Question67: A Linux administrator cloned an existing Linux server and built a new server from that clone. The administrator encountered the following error after booting the cloned server:

The administrator performed the commands listed below to further troubleshoot and mount the missing filesystem:

Which of the following should administrator use to resolve the device mismatch issue and mount the disk?

Question68: The application team has reported latency issues that are causing the application to crash on the Linux server.
The Linux administrator starts
troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

Question69: A Linux administrator has been tasked with installing the most recent versions of packages on a RPM-based OS. Which of the following commands will accomplish this task?

Question70: Several users reported that they were unable to write data to the /oracle1 directory. The following output has been provided:

Which of the following commands should the administrator use to diagnose the issue?

Question71: A systems administrator wants to permit access temporarily to an application running on port 1234/TCP on a Linux server. Which of the following commands will permit this traffic?

Question72: When trying to log in remotely to a server, a user receives the following message:

The server administrator is investigating the issue on the server and receives the following outputs:

Which of the following is causing the issue?

Question73: A Linux administrator intends to start using KVM on a Linux server. Which of the following commands will allow the administrator to load the KVM module as well as any related dependencies?

Question74: A systems administrator checked out the code from the repository, created a new branch, made changes to the code, and then updated the main branch. The systems administrator wants to ensure that the Terraform state files do not appear in the main branch. Which of following should the administrator use to meet this requirement?

Question75: A systems administrator wants to upgrade /bin/ someapp to a new version, but the administrator does not know the package name. Which of the following will show the RPM package name that provides that binary file?

Question76: A systems administrator made some changes in the ~/.bashrc file and added an alias command. When the administrator tried to use the alias command, it did not work. Which of the following should be executed FIRST?

Question77: A Linux administrator needs to obtain a list of all volumes that are part of a volume group. Which of the following commands should the administrator use to accomplish this task?

Question78: An administrator added the port 2222 for the SSH server on myhost and restarted the SSH server. The administrator noticed issues during the startup of the service. Given the following outputs:

Which of the following commands will fix the issue?

Question79: A junior systems administrator recently installed an HBA card in one of the servers that is deployed for a production environment. Which of the following commands can the administrator use to confirm on which server the card was installed?

Question80: An administrator needs to make an application change via a script that must be run only in console mode.
Which of the following best represents the sequence the administrator should execute to accomplish this task?

Question81: Which of the following data structures is written in JSON?

Question82: A junior developer is unable to access an application server and receives the following output:

The systems administrator investigates the issue and receives the following output:

Which of the following commands will help unlock the account?

Question83: Which of the following commands will display the operating system?

Question84: A systems administrator is tasked with installing GRUB on the legacy MBR of the SATA hard drive. Which of the following commands will help the administrator accomplish this task?

Question85: A systems administrator is checking the system logs. The administrator wants to look at the last 20 lines of a log. Which of the following will execute the command?

Question86: A junior administrator is setting up a new Linux server that is intended to be used as a router at a remote site.
Which of the following parameters will accomplish this goal?

Question87: A systems administrator created a web server for the company and is required to add a tag for the API so end users can connect. Which of the following would the administrator do to complete this requirement?

Question88: Which of the following can be used as a secure way to access a remote termi-nal?

Question89: Rugged appliances are small appliances with ruggedized hardware and like Quantum Spark appliance they use which operating system?

Question90: A Linux systems administrator is setting up a new web server and getting 404 - NOT FOUND errors while trying to access the web server pages from the browser. While working on the diagnosis of this issue, the Linux systems administrator executes the following commands:

Which of the following commands will BEST resolve this issue?

Question91: A systems administrator receives reports that several virtual machines in a host are responding slower than expected. Upon further investigation, the administrator obtains the following output from one of the affected systems:

Which of the following best explains the reported issue?

Question92: Which of the following should be used to verify the integrity of a file?

Question93: A cloud engineer needs to check the link status of a network interface named eth1 in a Linux server. Which of the following commands can help to achieve the goal?

Question94: A developer needs to launch an Nginx image container, name it Web001, and ex-pose port 8080 externally while mapping to port 80 inside the container. Which of the following commands will accomplish this task?

Question95: Which of the following directories is the mount point in a UEFI system?

Question96: Developers have requested implementation of a persistent, static route on the application server. Packets sent over the interface eth0 to 10.0.213.5/32 should be routed via 10.0.5.1. Which of the following commands should the administrator run to achieve this goal?

Question97: A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots. Which of the following commands should be run on the DNS forwarder server to accomplish this task?

Question98: A Linux administrator has logged in to a server for the first time and needs to know which services are allowed through the firewall. Which of the following options will return the results for which the administrator is looking?

Question99: A Linux administrator is reviewing changes to a configuration file that includes the following section:

The Linux administrator is trying to select the appropriate syntax formatter to correct any issues with the configuration file. Which of the following should the syntax formatter support to meet this goal?

Question100: What is the main objective when using Application Control?

Question101: A user created the following script file:
# ! /bin/bash
# FILENAME: /home/user/ script . sh
echo "hello world"
exit 1
However, when the user tried to run the script file using the command "script . sh, an error returned indicating permission was denied. Which of the follow-ing should the user execute in order for the script to run properly?

Question102: An administrator is trying to diagnose a performance issue and is reviewing the following output:

System Properties:
CPU: 4 vCPU
Memory: 40GB
Disk maximum IOPS: 690
Disk maximum throughput: 44Mbps | 44000Kbps
Based on the above output, which of the following BEST describes the root cause?

Question103: A systems administrator installed a new software program on a Linux server. When the systems administrator tries to run the program, the following message appears on the screen.

Which of the following commands will allow the systems administrator to check whether the system supports virtualization?

Question104: A Linux administrator needs to analyze a failing application that is running inside a container. Which of the following commands allows the Linux administrator to enter the running container and analyze the logs that are stored inside?

Question105: A Linux systems administrator receives a notification that one of the server's filesystems is full. Which of the following commands would help the administrator to identify this filesystem?

Question106: Users in the human resources department are trying to access files in a newly created directory. Which of the following commands will allow the users access to the files?

Question107: A server is experiencing intermittent connection issues. Some connections to the Internet work as intended, but some fail as if there is no connectivity. The systems administrator inspects the server configuration:

Which of the following is MOST likely the cause of the issue?

Question108: A developer wants to ensure that all files and folders created inside a shared folder named /GroupOODEV inherit the group name of the parent folder. Which of the following commands will help achieve this goal?

Question109: Which of the following commands is used to configure the default permissions for new files?

Question110: A systems administrator is deploying three identical, cloud-based servers. The administrator is using the following code to complete the task:

Which of the following technologies is the administrator using?

Question111: A Linux administrator booted up the server and was presented with a non-GUI terminal. The administrator ran the command systemct1 isolate graphical.target and rebooted the system by running systemct1 reboot, which fixed the issue. However, the next day the administrator was presented again with a non-GUI terminal. Which of the following is the issue?

Question112: A systems administrator wants to list all local accounts in which the UID is greater than 500. Which of the following commands will give the correct output?

Question113: A Linux engineer needs to download a ZIP file and wants to set the nice of value to -10 for this new process.
Which of the following commands will help to accomplish the task?

Question114: After installing a new version of a package, a systems administrator notices a new version of the corresponding, service file was Installed In order to use the new version of the, service file, which of the following commands must be Issued FIRST?

Question115: A systems administrator wants to test the route between IP address 10.0.2.15 and IP address 192.168.1.40.
Which of the following commands will accomplish this task?

Question116: After installing some RPM packages, a systems administrator discovers the last package that was installed was not needed. Which of the following commands can be used to remove the package?

Question117: A systems administrator created a new Docker image called test. After building the image, the administrator forgot to version the release. Which of the following will allow the administrator to assign the v1 version to the image?

Question118: A Linux engineer set up two local DNS servers (10.10.10.10 and 10.10.10.20) and was testing email connectivity to the local mail server using the mail command on a local machine when the following error appeared:

The local machine DNS settings are:

Which of the following commands could the engineer use to query the DNS server to get mail server information?

Question119: A Linux administrator rebooted a server. Users then reported some of their files were missing. After doing some troubleshooting, the administrator found one of the filesystems was missing. The filesystem was not listed in /etc/f stab and might have been mounted manually by someone prior to reboot. Which of the following would prevent this issue from reoccurring in the future?