- A
Incorrect time configuration in the BIOS
Why wrong: Time configuration does not cause a mount failure during boot.
- B
Corrupt initramfs missing a necessary kernel module for the root device
The kernel cannot mount root because the required driver is missing from initramfs.
- C
The /etc/fstab file has an invalid filesystem type for the root partition
Why wrong: While fstab issues can cause problems, the kernel panic occurs before fstab is read.
- D
A defective network cable
Why wrong: Network issues do not affect local root filesystem mounting.
Question 835 of 981
XK0-005 Troubleshooting Practice Question
This XK0-005 practice question tests your understanding of troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
During boot, a Linux system displays a kernel panic with 'VFS: Unable to mount root fs on unknown-block(0,0)'. Which of the following is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Corrupt initramfs missing a necessary kernel module for the root device
This error indicates that the root filesystem cannot be found, often due to a missing driver for the storage device in the initramfs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Incorrect time configuration in the BIOS
Why it's wrong here
Time configuration does not cause a mount failure during boot.
- ✓
Corrupt initramfs missing a necessary kernel module for the root device
Why this is correct
The kernel cannot mount root because the required driver is missing from initramfs.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The /etc/fstab file has an invalid filesystem type for the root partition
Why it's wrong here
While fstab issues can cause problems, the kernel panic occurs before fstab is read.
- ✗
A defective network cable
Why it's wrong here
Network issues do not affect local root filesystem mounting.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which XK0-005 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Troubleshooting — study guide chapter
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Troubleshooting practice questions
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FAQ
Questions learners often ask
What does this XK0-005 question test?
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Corrupt initramfs missing a necessary kernel module for the root device — This error indicates that the root filesystem cannot be found, often due to a missing driver for the storage device in the initramfs.
What should I do if I get this XK0-005 question wrong?
Identify which XK0-005 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 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.
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