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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Number: | XK0-006 |
| Available Languages: | English |
| Passing Score: | 720 (on a scale of 100–900) |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | Maximum of 90 |
| Related Certifications: | CompTIA Linux+ |
| Exam Duration: | 90 minutes |
| Exam Price: | USD 348 |
| Exam Format: | Performance-based, Multiple-choice |
| Sample Questions: | CompTIA XK0-006 Sample Questions |
| Exam Way: | Online (via Pearson VUE) or In-person at Pearson VUE testing centers |
| Pre Condition: | No formal prerequisites; recommended 12 months of hands-on experience with Linux administration |
| Official Syllabus URL: | https://www.comptia.org/en-us/certifications/linux |
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NEW QUESTION # 51
A systems administrator is restoring data from a backup. While analyzing the file format, the administrator sees the following output:
data: 7-zip archive data, version 0.4
Which of the following commands should the administrator use to help extract the data?
Answer: A
Explanation:
The output indicates the file is a 7-zip archive, and the 7za command is specifically designed to extract 7-zip formatted archives, making it the appropriate tool to restore the data.
NEW QUESTION # 52
A user states that an NFS share Is reporting random disconnections. The systems administrator obtains the following information
Which of the following best explains the symptoms that are being reported?
Answer: D
Explanation:
This issue is best analyzed using a layered troubleshooting approach, as recommended in the Troubleshooting domain of CompTIA Linux+ V8. The reported symptom is intermittent or random disconnections from an NFS share, which commonly indicates a network reliability issue rather than a configuration or filesystem problem.
The most critical evidence comes from the output of ip -s link show. The network interface enp1s0 is reporting significant numbers of errors and dropped packets on both the receive (RX) and transmit (TX) paths. High packet loss at the network interface level directly affects protocols like NFS, which rely on stable, continuous TCP/IP communication. When packets are dropped or corrupted, NFS clients may experience timeouts, retransmissions, and apparent disconnections.
Although the df -h output shows that the NFS filesystem is 95% full, this alone does not typically cause random disconnections. A nearly full filesystem may lead to write failures or performance degradation, but it does not explain intermittent connectivity loss. Linux+ V8 documentation notes that filesystem capacity issues usually present as I/O errors, not transport-layer disconnects.
Options A and B can also be ruled out. If the mount point or IP address were incorrect, the NFS share would fail consistently rather than intermittently. The fact that the share is mounted and accessible confirms that the mount configuration and IP addressing are correct.
Linux+ V8 emphasizes that NFS performance and reliability are highly sensitive to network quality. Packet errors, drops, faulty NICs, cabling issues, duplex mismatches, or driver problems commonly result in unstable NFS behavior.
Therefore, the best explanation for the reported random disconnections is D. The interface is reporting a high number of errors and dropped packets.
NEW QUESTION # 53
A Linux administrator is testing a web application on a laboratory service and needs to temporarily allow DNS and HTTP/HTTPS traffic from the internal network. Which of the following commands will accomplish this task?
Answer: D
Explanation:
The correct way to temporarily allow specific services in a particular zone with firewalld is to use firewall-cmd --add-service=service --zone=zone. Multiple services can be specified in curly braces and separated by commas. The correct syntax is:
bash
CopyEdit
firewall-cmd --add-service={dns,http,https} --zone=internal
This command will allow DNS (port 53), HTTP (port 80), and HTTPS (port 443) through the firewall for the "internal" zone temporarily (for the current runtime session).
NEW QUESTION # 54
A Linux administrator is testing a web application on a laboratory service and needs to temporarily allow DNS and HTTP/HTTPS traffic from the internal network. Which of the following commands will accomplish this task?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The correct way to temporarily allow specific services in a particular zone with firewalld is to use firewall- cmd --add-service=service --zone=zone. Multiple services can be specified in curly braces and separated by commas. The correct syntax is:
bash
CopyEdit
firewall-cmd --add-service={dns,http,https} --zone=internal
This command will allow DNS (port 53), HTTP (port 80), and HTTPS (port 443) through the firewall for the
"internal" zone temporarily (for the current runtime session).
Other options:
* A. The command syntax is incorrect; firewalld is a service, not a command-line tool.
* B. iptables does not use the --enable-service flag, nor does it have zones in this way.
* D. systemctl mask disables services, and the rest of the command is invalid.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 9: "Networking", Section: "Managing Firewalls with firewalld" CompTIA Linux+ XK0-006 Objectives, Domain 2.0: Networking
NEW QUESTION # 55
Which of the following commands sets all the directories' permissions recursively in the user's home directory and as accessible only to the user?
Answer: A
Explanation:
This command searches for all directories within the user's home directory and sets their permissions to allow access only by the owning user, ensuring privacy and proper access control.
NEW QUESTION # 56
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