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Quiz CompTIA - Valid XK0-006 New Study Materials

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CompTIA Linux+ Certification Exam Sample Questions (Q80-Q85):

NEW QUESTION # 80
A Linux systems administrator needs to extract the contents of a file named
/home/dev/web.bkpto the /var/www/html/directory. Which of the following commands should the administrator use?

A. cd /var/www/html/ && gzip -c /home/dev/web.bkp | tar xf -
B. tar -c -f /home/dev/web.bkp /var/www/html/
C. unzip -c /home/dev/web.bkp /var/www/html/
D. pushd /var/www/html/ $$ cpio -idv < /home/dev/web.bkp && popd

Answer: D

Explanation:
The .bkp file here is a cpio archive, not a tar or zip. The correct way to extract it is by changing into the target directory (/var/www/html/) and using cpio -idv < /home/dev/web.bkp. The pushd and popd commands ensure the administrator returns to the original directory afterward.

NEW QUESTION # 81
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. cp -rp /dev/sdc/* /tmp/image
B. cpio -i /dev/sdc -ov /tmp/image
C. tar cvzf /tmp/image /dev/sdc
D. dd if=/dev/sdc of=/tmp/image bs=8192

Answer: D

Explanation:
The dd command performs a low-level, block-by-block copy of a device. Using if=/dev/sdc (input file) and of=/tmp/image (output file) with a block size (bs) ensures an exact replica of the disk, suitable for forensic analysis.

NEW QUESTION # 82
While hardening a system, an administrator runs a port scan with Nmap, which returned the following output:

Which of the following is the best way to address this security issue?

A. Closing port 80 on the network switch to block traffic
B. Changing the systems administrator's password to prevent unauthorized access
C. Configuring a firewall to block traffic on port 23 on the server
D. Disabling and removing the Telnet service on the server

Answer: D

Explanation:
Port 23/tcp indicates Telnet, which is insecure because it transmits data in plaintext. The best hardening approach is to disable and remove the Telnet service entirely, eliminating the vulnerability rather than just blocking it at the firewall. Secure alternatives like SSH should be used instead.

NEW QUESTION # 83
A Linux administrator needs to create and then connect to the app-01-imagecontainer. Which of the following commands accomplishes this task?

A. docker start -td app-01-image
B. docker exec -dc app-01-image
C. docker run -it app-01-image
D. docker build -ic app-01-image

Answer: C

Explanation:
The docker run -it command both creates a new container from the specified image and attaches to it interactively, which is exactly what the administrator needs.

NEW QUESTION # 84
A Linux user runs the following command:
nohup ping comptia.com &
Which of the following commands should the user execute to attach the process to the current terminal?

A. renice
B. fg
C. jobs
D. exec

Answer: B

Explanation:
The fg command brings a background job to the foreground, attaching it to the current terminal.
Since the ping process was started in the background with &, fg is the correct way to reattach it.

NEW QUESTION # 85
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