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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Number: | XK0-006 |
| Exam Format: | Performance-based, Multiple-choice |
| Related Certifications: | CompTIA Linux+ |
| Real Exam Qty: | Maximum of 90 |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Exam Price: | USD 348 |
| Passing Score: | 720 (on a scale of 100–900) |
| 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 # 44
An administrator completes maintenance on a server but cannot remount the logical volume.
Given the following output:
Which of the following commands should the administrator execute to resolve the issue?
Answer: C
Explanation:
The error message "special device /dev/data/files does not exist" suggests that the volume group data is not activated. From the lvsand vgsoutput:
- The logical volume files exists within the data volume group.
- The volume group (VG) and logical volume (LV) appear correctly listed, but they might be in an inactive state due to maintenance.
NEW QUESTION # 45
A Linux administrator tries to install Ansible in a Linux environment. One of the steps is to change the owner and the group of the directory /opt/Ansible and its contents. Which of the following commands will accomplish this task?
Answer: B
Explanation:
The chown command is used to change the owner and group of files and directories. The -R (recursive) flag ensures that all contents within the directory are also updated. The correct syntax is chown -R owner:group directory. So, chown -R Ansible:Ansible /opt/Ansible will change the owner and group for /opt/Ansible and everything inside it to "Ansible".
NEW QUESTION # 46
Which of the following is a characteristic of Python 3?
Answer: C
Explanation:
Python 3 is open source and supports extensibility through modules and packages, allowing developers to add functionality easily. It is not fully backward compatible with Python 2 and has no binary compatibility with Java.
NEW QUESTION # 47
A systems administrator manages multiple Linux servers and needs to set up a reliable and secure way to handle the complexity of managing event records on the OS and application levels. Which of the following should the administrator do?
Answer: D
Explanation:
Log management is a critical system management function highlighted in CompTIA Linux+ V8, particularly in multi-server environments. As the number of systems and applications grows, managing logs locally on each server becomes inefficient and error-prone.
The best solution is to implement a centralized log aggregation solution, making option B correct.
Centralized logging collects logs from multiple systems and applications into a single, secure location. This simplifies monitoring, searching, correlation, auditing, and incident response. Common solutions include syslog servers, ELK/EFK stacks, and SIEM platforms.
Linux+ V8 documentation emphasizes centralized logging as a best practice for availability, troubleshooting, and security analysis. It enables administrators to detect patterns, investigate incidents, and maintain compliance more effectively than isolated log files.
The other options are insufficient on their own. On-demand retrieval does not scale well. Log backups protect data but do not simplify analysis. Log rotation manages disk usage but does not address distributed log complexity.
Therefore, the correct answer is B. Implement a centralized log aggregation solution.
NEW QUESTION # 48
A Linux administrator updates the DNS record for the company using:
cat /etc/bind/db.abc.com
The revised partial zone file is as follows:
ns1 IN A 192.168.40.251
ns2 IN A 192.168.40.252
www IN A 192.168.30.30
When the administrator attempts to resolve www.abc.com to its IP address, the domain name still points to its old IP mapping:
nslookup www.abc.com
Server: 192.168.40.251
Address: 192.168.40.251#53
Non-authoritative
Name: www.abc.com
Address: 199.168.20.81
Which of the following should the administrator execute to retrieve the updated IP mapping?
Answer: C
Explanation:
This scenario represents a classic DNS troubleshooting situation covered in the Troubleshooting domain of the CompTIA Linux+ V8 objectives. Although the DNS zone file has been updated correctly on the BIND server, the system continues to resolve the domain name to an outdated IP address. This behavior strongly indicates DNS caching rather than a configuration error in the zone file itself.
Modern Linux systems that use systemd-resolved cache DNS responses locally to improve performance and reduce external queries. Even after a DNS record is updated on the authoritative server, cached results may persist until the cache expires or is manually cleared.
The nslookup output showing a non-authoritative answer further confirms that the response is being served from a cache rather than directly from the updated zone data.
The correct solution is to flush the local DNS cache so the system can retrieve the updated record from the DNS server. The command resolvectl flush-caches clears all cached DNS entries maintained by systemd-resolved, forcing fresh queries to authoritative name servers. This aligns directly with Linux+ V8 documentation for resolving name resolution inconsistencies caused by stale cache entries.
NEW QUESTION # 49
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