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.
An administrator has created an LVM thin pool. Which command should be used to create a thin logical volume named 'thinvol' of size 100GB from the thin pool 'pool1' in volume group 'vg1'?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
lvcreate -L 100G -n thinvol vg1
Why wrong: Creates regular LV, not thin.
lvcreate -s vg1/pool1 -n thinvol
Why wrong: Creates snapshot, not thin.
lvcreate -V 100G -T vg1/pool1 --name thinvol
Correct command.
lvcreate -L 100G -T vg1/pool1 --name thinvol
Why wrong: Uses -L for size, which is for regular LVs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
lvcreate -V 100G -T vg1/pool1 --name thinvol
Option C is correct because the `lvcreate` command for thin logical volumes requires the `-V` flag to specify the virtual size of the thin volume and the `-T` flag to reference the thin pool. The syntax `-V 100G -T vg1/pool1 --name thinvol` correctly creates a thin logical volume named 'thinvol' with a virtual size of 100GB from the thin pool 'pool1' in volume group 'vg1'.
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.
lvcreate -L 100G -n thinvol vg1
Why it's wrong here
Creates regular LV, not thin.
lvcreate -s vg1/pool1 -n thinvol
Why it's wrong here
Creates snapshot, not thin.
lvcreate -V 100G -T vg1/pool1 --name thinvol
Why this is correct
Correct command.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
lvcreate -L 100G -T vg1/pool1 --name thinvol
Why it's wrong here
Uses -L for size, which is for regular LVs.
Common exam traps
The trap here is that candidates often confuse the `-L` flag (used for standard LVs or pool sizes) with the `-V` flag (required for thin volumes), leading them to select option D, which incorrectly uses `-L` instead of `-V` for the thin volume's virtual size.
Detailed technical explanation
Thin provisioning in LVM allows overcommitting storage by creating thin logical volumes that report a larger virtual size than the physical backing store. The thin pool (e.g., 'pool1') consists of a data LV and a metadata LV; the `-V` flag sets the virtual size of the thin volume, while the `-T` flag identifies the thin pool. In real-world scenarios, this enables efficient storage utilization, such as allocating 100GB virtual disks to multiple VMs while only consuming actual used blocks from a smaller physical pool.
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 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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Storage Management — study guide chapter
Learn the concepts, then practise the questions
Storage Management practice questions
Targeted practice on this topic area only
All LFCS questions
513 questions across all exam domains
Linux Foundation Certified System Administrator LFCS study guide
Full concept coverage aligned to exam objectives
LFCS 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 LFCS questions linked to User and Group Management.
Practise LFCS questions linked to Operation of Running Systems.
Practise LFCS questions linked to Essential Commands.
Practise LFCS questions linked to Networking.
Practise LFCS questions linked to Service Configuration.
Practise LFCS questions linked to Storage Management.
Practise LFCS questions linked to LFCS fundamentals.
Practise LFCS questions linked to LFCS scenario.
Practise LFCS questions linked to LFCS troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Storage Management — This question tests Storage Management — Read the scenario before looking for a memorised answer..
The correct answer is: lvcreate -V 100G -T vg1/pool1 --name thinvol — Option C is correct because the `lvcreate` command for thin logical volumes requires the `-V` flag to specify the virtual size of the thin volume and the `-T` flag to reference the thin pool. The syntax `-V 100G -T vg1/pool1 --name thinvol` correctly creates a thin logical volume named 'thinvol' with a virtual size of 100GB from the thin pool 'pool1' in volume group 'vg1'.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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 →
Keep practising
Last reviewed: Jun 25, 2026
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.