Quick Answer
The answer is that the filesystem was not resized after extending the logical volume. When you run `lvextend`, it only increases the underlying block device’s capacity, but the filesystem layer—whether ext4 or XFS—still sees the original boundary until you explicitly resize it with `resize2fs` or `xfs_growfs`. This is why `df` still shows the old 250G size even though the logical volume now reports 500G via `lvs`. On the Red Hat Certified System Administrator EX200 exam, this is a classic trap: candidates often assume extending the LV automatically grows the filesystem, but the two steps are separate. The exam tests your understanding that `lvextend` is a storage operation, while filesystem resizing is a data operation. A reliable memory tip is “extend the LV, then grow the FS”—think of it as two distinct commands, not one.
This EX200 practice question tests your understanding of create and configure file systems. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
After extending the logical volume to 500G, why does df still show 250G?
The mount point is incorrect.
Why wrong: Mount point is correct.
The physical volume is full.
Why wrong: VFree shows 250G free.
The filesystem was not resized after extending the LV.
Need to run resize2fs or xfs_growfs.
The logical volume extension failed.
Why wrong: lvextend succeeded.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The filesystem was not resized after extending the LV.
Option C is correct because extending a logical volume (LV) with `lvextend` only increases the block device size; the filesystem on top must be resized separately using `resize2fs` (for ext4) or `xfs_growfs` (for XFS). Without this step, the filesystem still sees the original size, so `df` reports 250G instead of 500G.
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.
The mount point is incorrect.
Why it's wrong here
Mount point is correct.
The physical volume is full.
Why it's wrong here
VFree shows 250G free.
The filesystem was not resized after extending the LV.
Why this is correct
Need to run resize2fs or xfs_growfs.
Related concept
Read the scenario before looking for a memorised answer.
The logical volume extension failed.
Why it's wrong here
lvextend succeeded.
Common exam traps
Red Hat often tests the misconception that extending the logical volume automatically resizes the filesystem, leading candidates to think the extension itself is sufficient.
Trap categories for this question
Command / output trap
VFree shows 250G free.
Detailed technical explanation
Under the hood, `lvextend` modifies the LVM metadata to allocate additional physical extents to the LV, but the filesystem superblock still records the original block count. For ext4, `resize2fs` reads the new device size and updates the superblock; for XFS, `xfs_growfs` requires the mount point and can only grow, not shrink. A real-world scenario is extending a root filesystem: forgetting `resize2fs` after `lvextend` leaves the system unable to use the new space until a reboot or manual resize.
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 EX200 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.
Create and configure file systems — study guide chapter
Learn the concepts, then practise the questions
Create and configure file systems practice questions
Targeted practice on this topic area only
All EX200 questions
527 questions across all exam domains
Red Hat Certified System Administrator EX200 study guide
Full concept coverage aligned to exam objectives
EX200 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 EX200 questions linked to Operate running systems.
Practise EX200 questions linked to Configure local storage.
Practise EX200 questions linked to Create and configure file systems.
Practise EX200 questions linked to Deploy, configure, and maintain systems.
Practise EX200 questions linked to Manage users and groups.
Practise EX200 questions linked to Manage security.
Practise EX200 questions linked to Manage containers.
Practise EX200 questions linked to Create simple shell scripts.
Practise EX200 questions linked to Essential Tools.
Practise EX200 questions linked to EX200 fundamentals.
Practise EX200 questions linked to EX200 scenario.
Practise EX200 questions linked to EX200 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Create and configure file systems — This question tests Create and configure file systems — Read the scenario before looking for a memorised answer..
The correct answer is: The filesystem was not resized after extending the LV. — Option C is correct because extending a logical volume (LV) with `lvextend` only increases the block device size; the filesystem on top must be resized separately using `resize2fs` (for ext4) or `xfs_growfs` (for XFS). Without this step, the filesystem still sees the original size, so `df` reports 250G instead of 500G.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
Last reviewed: Jun 30, 2026
This EX200 practice question is part of Courseiva's free Red Hat 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 EX200 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.