Quick Answer
The correct answer is to rebuild the initramfs. After a kernel update, the initramfs—the initial RAM filesystem loaded into memory at boot—must be regenerated to include the new kernel’s drivers and modules. Even if the NIC kernel module is compiled for the new kernel, the initramfs may still reference the old kernel’s module tree or omit the new module entirely, causing the network interface to remain undetected during early boot. On the CompTIA Linux+ XK0-005 exam, this scenario tests your understanding of the boot process and module loading order; a common trap is assuming that simply having the module file present is sufficient. Remember that the initramfs acts as a snapshot of essential drivers at boot time, so it must be updated to match the current kernel. For a quick memory tip, think “new kernel, new initramfs”—run `dracut -f` on Red Hat systems or `update-initramfs -u` on Debian-based systems to force a rebuild and ensure your NIC is detected.
This XK0-005 practice question tests your understanding of troubleshooting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
After a kernel update, the system boots but the network interface enp0s3 is not detected. The administrator verifies that the kernel module for the NIC is built for the new kernel. Which of the following should be done to ensure the module loads correctly?
Load the module with modprobe
Why wrong: Temporary, not persistent.
Rebuild the initramfs
Ensures the new kernel's module is available at boot.
Update the udev rules
Why wrong: Affects device naming, not module loading.
Reinstall the kernel package
Why wrong: Does not ensure module is included in initramfs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Rebuild the initramfs
After a kernel update, the initramfs (initial RAM filesystem) must be rebuilt to include the new kernel's modules. Even though the NIC module is built for the new kernel, the initramfs may still contain the old kernel's modules or lack the new module entirely, preventing it from being loaded during early boot. Running `dracut -f` (or `update-initramfs -u` on Debian-based systems) rebuilds the initramfs to match the current kernel, ensuring the NIC module is available at boot time.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Load the module with modprobe
Why it's wrong here
Temporary, not persistent.
Rebuild the initramfs
Why this is correct
Ensures the new kernel's module is available at boot.
Related concept
Read the scenario before looking for a memorised answer.
Update the udev rules
Why it's wrong here
Affects device naming, not module loading.
Reinstall the kernel package
Why it's wrong here
Does not ensure module is included in initramfs.
Common exam traps
The trap here is that candidates assume loading the module with modprobe (Option A) will fix the issue, but they overlook that the module must be available in the initramfs to be loaded during early boot before the root filesystem is accessible.
Detailed technical explanation
The initramfs is a compressed cpio archive that contains essential kernel modules and scripts needed to mount the root filesystem. When a kernel is updated, the initramfs must be regenerated (e.g., via `dracut -f` or `update-initramfs -u`) so that it includes the new kernel's modules; otherwise, the kernel may fail to load drivers for critical hardware like the NIC. In some distributions, the kernel update process automatically triggers initramfs rebuild, but if it does not (e.g., due to a manual update or a packaging bug), the administrator must manually rebuild it.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the XK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Troubleshooting — study guide chapter
Learn the concepts, then practise the questions
Troubleshooting practice questions
Targeted practice on this topic area only
All XK0-005 questions
510 questions across all exam domains
CompTIA Linux+ XK0-005 study guide
Full concept coverage aligned to exam objectives
XK0-005 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise XK0-005 questions linked to Security.
Practise XK0-005 questions linked to Troubleshooting.
Practise XK0-005 questions linked to Scripting, Containers and Automation.
Practise XK0-005 questions linked to System Management.
Practise XK0-005 questions linked to XK0-005 fundamentals.
Practise XK0-005 questions linked to XK0-005 scenario.
Practise XK0-005 questions linked to XK0-005 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
The correct answer is: Rebuild the initramfs — After a kernel update, the initramfs (initial RAM filesystem) must be rebuilt to include the new kernel's modules. Even though the NIC module is built for the new kernel, the initramfs may still contain the old kernel's modules or lack the new module entirely, preventing it from being loaded during early boot. Running `dracut -f` (or `update-initramfs -u` on Debian-based systems) rebuilds the initramfs to match the current kernel, ensuring the NIC module is available at boot time.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 25, 2026
This XK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-005 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.