- A
Add the logical volume to the volume group with '--auto-resize' flag.
Why wrong: The flag does not exist.
- B
Extend the physical volume, extend the logical volume, and update /etc/fstab with 'auto-resize' option.
Why wrong: No such mount option.
- C
Mount the filesystem with the 'extend' option to allow automatic resize on PV changes.
Why wrong: No such mount option exists.
- D
Extend the physical volume, extend the logical volume, and then run resize2fs (or xfs_growfs) to resize the filesystem.
Filesystem resize is a manual step after LV extension.
Question 497 of 513
LFCS Storage Management Practice Question
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 wants to ensure that a specific LVM logical volume is automatically resized when the underlying physical volume is extended. Which steps are required?
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
✓
Extend the physical volume, extend the logical volume, and then run resize2fs (or xfs_growfs) to resize the filesystem.
Option D is correct because after extending the underlying physical volume (PV) and the logical volume (LV), the filesystem must be resized to utilize the new space. For ext4, this is done with `resize2fs`; for XFS, `xfs_growfs` is used. LVM does not automatically resize the filesystem when the PV or LV is extended; manual intervention is required to grow the filesystem.
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.
- ✗
Add the logical volume to the volume group with '--auto-resize' flag.
Why it's wrong here
The flag does not exist.
- ✗
Extend the physical volume, extend the logical volume, and update /etc/fstab with 'auto-resize' option.
Why it's wrong here
No such mount option.
- ✗
Mount the filesystem with the 'extend' option to allow automatic resize on PV changes.
Why it's wrong here
No such mount option exists.
- ✓
Extend the physical volume, extend the logical volume, and then run resize2fs (or xfs_growfs) to resize the filesystem.
Why this is correct
Filesystem resize is a manual step after LV extension.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume extending the LV automatically resizes the filesystem, but LVM requires a separate filesystem-specific command (resize2fs or xfs_growfs) to complete the operation.
Detailed technical explanation
How to think about this question
Under the hood, LVM separates the logical volume management from the filesystem layer. When a PV is extended (e.g., via `pvresize` after adding disk space), the VG and LV must be extended with `lvextend` before the filesystem can be grown. For ext4, `resize2fs` can be run online without unmounting; for XFS, `xfs_growfs` requires the filesystem to be mounted. In real-world scenarios, failing to run the filesystem resize command after extending the LV is a common cause of 'no space left' errors despite available LV space.
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.
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FAQ
Questions learners often ask
What does this LFCS question test?
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: Extend the physical volume, extend the logical volume, and then run resize2fs (or xfs_growfs) to resize the filesystem. — Option D is correct because after extending the underlying physical volume (PV) and the logical volume (LV), the filesystem must be resized to utilize the new space. For ext4, this is done with `resize2fs`; for XFS, `xfs_growfs` is used. LVM does not automatically resize the filesystem when the PV or LV is extended; manual intervention is required to grow the filesystem.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 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.
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