This LFCS practice question tests your understanding of storage management. 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.
A system administrator receives a report that a server with an ext4 filesystem becomes unresponsive when a particular process writes a large file. The root filesystem is not full. 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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The filesystem has experienced a corruption; running 'fsck' may resolve the issue.
Option C is correct because filesystem corruption can cause the system to hang when a process attempts to write to a damaged area, even if the filesystem is not full. The ext4 journal may replay inconsistent metadata, leading to an I/O stall. Running 'fsck' can detect and repair such corruption, restoring normal operation.
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.
✗
The journal size is too large and causes excessive disk writes.
Why it's wrong here
Journal size does not cause unresponsiveness.
✗
The filesystem is mounted with the 'noatime' option, causing frequent access time updates.
Why it's wrong here
noatime reduces writes, not causing unresponsiveness.
✓
The filesystem has experienced a corruption; running 'fsck' may resolve the issue.
Why this is correct
Corruption can cause I/O hangs.
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 hard disk has developed bad sectors that affect only that file's location.
Why it's wrong here
Bad sectors cause errors, but likely affect more than one file.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a full filesystem is the only cause of write-related hangs, overlooking that filesystem corruption can cause the kernel to stall on journal replay or metadata operations even when space is available.
Detailed technical explanation
How to think about this question
Ext4 uses a journal (typically stored in a separate inode) to ensure filesystem consistency after a crash. If the journal itself becomes corrupted (e.g., due to a power loss or hardware fault), the kernel may enter an infinite loop trying to replay it, causing the system to appear unresponsive. The 'fsck' utility can check and repair the journal and other metadata structures, but note that for a root filesystem, it must be run from a rescue environment or during early boot.
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.
TExam Day Tips
→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 LFCS 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Storage Management — This question tests Storage Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The filesystem has experienced a corruption; running 'fsck' may resolve the issue. — Option C is correct because filesystem corruption can cause the system to hang when a process attempts to write to a damaged area, even if the filesystem is not full. The ext4 journal may replay inconsistent metadata, leading to an I/O stall. Running 'fsck' can detect and repair such corruption, restoring normal operation.
What should I do if I get this LFCS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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
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 →
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.
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS 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.