XK0-006 Fragen Und Antworten, XK0-006 Antworten

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CompTIA XK0-006 Exam Syllabus Topics:

SectionWeightObjectives
Scripting, Containers & Automation20%- Automation and scripting
  • 1. Shell scripting fundamentals (bash)
    • 2. Configuration management concepts
      • 3. Task automation using cron and system tools
        • 4. Container basics (Docker concepts)
          Security25%- System security and access control
          • 1. Authentication and authorization mechanisms
            • 2. Firewall configuration (firewalld, iptables)
              • 3. User and group management
                • 4. File permissions and ownership
                  Troubleshooting25%- System and network troubleshooting
                  • 1. Log file analysis and system diagnostics
                    • 2. Performance and resource monitoring
                      • 3. Diagnosing boot and service failures
                        • 4. Network connectivity troubleshooting
                          System Management30%- Linux installation, configuration, and system management
                          • 1. System initialization and service management (systemd)
                            • 2. Storage configuration (partitions, LVM, filesystems)
                              • 3. Package management (RPM, DPKG, YUM, APT)
                                • 4. Kernel modules and system boot process

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                                  CompTIA Linux+ Certification Exam XK0-006 Prüfungsfragen mit Lösungen (Q148-Q153):

                                  148. Frage
                                  Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?

                                  Antwort: C

                                  Begründung:
                                  dmidecode retrieves detailed hardware information from the system's DMI/SMBIOS, including BIOS, CPU, memory, and motherboard details, providing a full hardware inventory.


                                  149. Frage
                                  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?

                                  Antwort: B

                                  Begründung:
                                  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.


                                  150. Frage
                                  A Linux administrator is creating a symbolic link /home/docsleading to the
                                  /usr/share/documents/directory. Which of the following commands allows the administrator to achieve this goal?

                                  Antwort: C

                                  Begründung:
                                  This command creates a symbolic link at the specified path that points to the target directory, allowing access to the target through the new link location.


                                  151. Frage
                                  An
                                  administrator is investigating the reason a Linux workstation is not resolving the website http://www.comptia.
                                  org. The administrator executes some commands and receives the following output:

                                  Which of the following is the most likely cause?

                                  Antwort: C

                                  Begründung:
                                  When troubleshooting name resolution issues in Linux, /etc/hosts entries take precedence over DNS lookups.
                                  The workstation's /etc/hosts file contains the line:
                                  CopyEdit
                                  104.18.99.101 www.comptia.org
                                  This means any attempt to access www.comptia.org will resolve to 104.18.99.101, regardless of the real DNS response. However, both dig and nslookup show the correct IP as 104.18.16.29. Because the local /etc/hosts entry overrides DNS, and the hardcoded IP is either incorrect or unreachable, all network traffic to www.
                                  comptia.org will fail or not reach the intended destination, resulting in the observed connectivity issue (Destination Host Unreachable).
                                  Other options:
                                  * B. The lack of IPv6 support is irrelevant since the host is using IPv4 and the DNS queries for IPv4 (A record) are successful.
                                  * C. The firewall would block all HTTP/HTTPS connections, but the error shown is a host unreachable, not a port-specific issue.
                                  * D. The nameserver is working; both dig and nslookup queries succeed and return the correct A record.
                                  Reference:
                                  CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 8: "Networking Fundamentals", Section:
                                  "Troubleshooting Name Resolution"
                                  CompTIA Linux+ XK0-006 Objectives, Domain 2.0: Networking


                                  152. Frage
                                  A systems administrator wants to prevent the current contents of a file from being overwritten and wants to allow new additions at the end of the file. Which of the following commands should the administrator use?

                                  Antwort: C

                                  Begründung:
                                  The chattr +a command sets the append-only attribute on a file. This prevents overwriting or deletion of existing contents, while still allowing new data to be appended to the end of the file.


                                  153. Frage
                                  ......

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