LPIC-2 Practice Question: Block Devices, Filesystems and Advanced Storage
This LPIC-2 practice question tests your understanding of block devices, filesystems and advanced storage. 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.
Which THREE of the following are correct statements about LVM thin provisioning? (Select THREE)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Snapshots of thin volumes use the same pool.
Option A is correct because LVM thin provisioning uses a shared thin pool to store data for all thin volumes and their snapshots. When a snapshot of a thin volume is created, it does not allocate separate physical storage; instead, it references the same thin pool, allowing efficient space usage and copy-on-write semantics.
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.
✓
Snapshots of thin volumes use the same pool.
Why this is correct
Both thin volumes and snapshots share pool space.
Related concept
Read the scenario before looking for a memorised answer.
✓
Thin provisioning allows overcommitment of physical storage.
Why this is correct
This is the main advantage.
Related concept
Read the scenario before looking for a memorised answer.
✗
A thin pool can be resized smaller without data loss.
Why it's wrong here
Shrinking a thin pool may cause data loss.
✓
A thin volume can be larger than the pool.
Why this is correct
Overcommitment is allowed.
Related concept
Read the scenario before looking for a memorised answer.
✗
Thin volumes must be created before the thin pool.
Why it's wrong here
Pool must be created first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse thin pool resizing with standard logical volume resizing, assuming lvreduce can shrink a thin pool safely, when in fact LVM does not support shrinking thin pools without risking data loss.
Detailed technical explanation
How to think about this question
Under the hood, LVM thin provisioning uses a data LV and a metadata LV to form the thin pool, with chunk size (default 64 KiB) determining allocation granularity. The pool's metadata tracks which chunks are used, enabling overcommitment; when a write exceeds available pool space, the filesystem may encounter errors (e.g., ENOSPC) unless dmeventd is configured to auto-extend the pool. In real-world scenarios, administrators must monitor pool usage carefully to avoid silent data corruption from overcommitment.
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 LPIC-2 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.
Block Devices, Filesystems and Advanced Storage — This question tests Block Devices, Filesystems and Advanced Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Snapshots of thin volumes use the same pool. — Option A is correct because LVM thin provisioning uses a shared thin pool to store data for all thin volumes and their snapshots. When a snapshot of a thin volume is created, it does not allocate separate physical storage; instead, it references the same thin pool, allowing efficient space usage and copy-on-write semantics.
What should I do if I get this LPIC-2 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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