XK0-006 Practice Questions
Prepare for XK0-006 with more than an answer.
Unlock the full exam and previous versions
- v1CompTIA Linux+ V8 161 questions Current
- XK0-004Legacy CompTIA Linux+ (v6) 218 questions Locked
- XK0-005Legacy CompTIA Linux+ (v7) 279 questions Locked
- Exam fee
- $395 USD
- Level
- Professional
- Valid for
- 3 years
Domains covered on the exam 5
- System Management23%
- Services and User Management20%
- Security18%
- Automation, Orchestration, and Scripting17%
- Troubleshooting22%
- 1
A sysadmin needs to extract the usernames from the /etc/passwd file. The username is the first field in the file, and the fields are separated by colons (:). Which of the following commands will correctly extract ONLY the usernames?
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Correct answer: A
The awk command is highly efficient for field extraction. The '-F' flag defines the field separator (a colon in this case). '{print $1}' instructs awk to print the first field of each line, which corresponds to the username in the /etc/passwd file.
- 2
A junior administrator is tasked with synchronizing a local directory /data/ to a remote server at 192.168.1.50 over SSH. Which of the following tools is BEST suited for securely syncing these files while minimizing bandwidth usage by only transferring changed data?
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Correct answer: C
The 'rsync' utility is designed for fast, incremental file transfers and synchronization. It calculates the differences between source and destination files and only transfers the changed blocks, heavily reducing bandwidth. It can also operate securely over SSH.
- 3
An engineer is optimizing a KVM-based virtual machine running a database. To improve disk I/O performance, the engineer decides to use paravirtualized drivers instead of emulating legacy IDE or SATA hardware. Which of the following technologies should the engineer configure for the VM's disk?
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Correct answer: C
VirtIO is a standardized interface which allows virtual machines to use paravirtualized drivers for disk and network devices. This bypasses the overhead of full hardware emulation (like emulating an IDE controller), resulting in significantly higher I/O performance for the guest OS.
- 4
A technician is troubleshooting a network service and needs to view all active TCP listening sockets on a Linux server, along with the process IDs associated with them. Which command should the technician use?
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Correct answer: B
The 'ss' command is the modern utility to dump socket statistics. The flags used here represent: '-l' (listening sockets only), '-t' (TCP sockets only), and '-p' (show process IDs associated with the sockets). This makes it the perfect tool for identifying active services.
- 5
A system administrator needs to pass a custom kernel parameter temporarily during the boot process to troubleshoot a video driver issue. Which of the following is the CORRECT procedure to accomplish this without making the change permanent across reboots?
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Correct answer: B
Pressing 'e' at the GRUB menu allows you to temporarily edit the boot entry for that specific session. Appending the parameter to the kernel line (starting with linux or linux16) and booting with Ctrl+X applies the parameter only once. Editing /etc/default/grub makes the change persistent, which violates the requirement for a temporary change.
- 6
True or False: RISC-V is an open-standard instruction set architecture (ISA) based on established reduced instruction set computer principles, which allows organizations to build custom Linux-compatible processors without paying licensing fees.
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Correct answer: A
RISC-V is a widely adopted open-standard ISA provided under open-source licenses. Unlike proprietary architectures (such as x86 or ARM), it does not require licensing fees, making it an increasingly popular choice for custom hardware and embedded Linux systems.
