- A
lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab; mount -a
Correct sequence.
- B
pvcreate /dev/sdc; vgcreate vgdata /dev/sdc; lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why wrong: pvcreate and vgcreate are unnecessary; vgdata already exists.
- C
lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; mount /dev/vgdata/lvdata /mnt/data; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why wrong: Mounting before fstab update is okay, but the mount point /mnt/data must exist; the sequence is otherwise correct, but best practice is to create mount point first. However, the missing mount point creation is a minor issue; still the command sequence works if directory exists. But option A includes mount -a which ensures persistence. However, option D is also plausible. The question expects A as the most complete.
- D
mkfs.ext4 /dev/sdc; lvcreate -L 5G -n lvdata vgdata; mount /dev/vgdata/lvdata /mnt/data; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why wrong: mkfs on /dev/sdc is wrong; LV must be created first.
EX200 Configure local storage Practice Question
This EX200 practice question tests your understanding of configure local storage. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 needs to create a new logical volume named 'lvdata' of size 5G in vgdata, format it with ext4, and mount it persistently at /mnt/data. The system currently has /dev/sdc as a physical volume in vgdata. Which command sequence accomplishes this?
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.
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
lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab; mount -a
Option A is correct because it assumes the volume group vgdata and physical volume /dev/sdc already exist, so only the lvcreate command is needed to create the logical volume. It then formats the LV with ext4, adds a persistent mount entry to /etc/fstab, and uses mount -a to mount all filesystems from fstab, including the new entry. This sequence efficiently meets all requirements without redundant or incorrect steps.
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.
- ✓
lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab; mount -a
Why this is correct
Correct sequence.
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.
- ✗
pvcreate /dev/sdc; vgcreate vgdata /dev/sdc; lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why it's wrong here
pvcreate and vgcreate are unnecessary; vgdata already exists.
- ✗
lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; mount /dev/vgdata/lvdata /mnt/data; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why it's wrong here
Mounting before fstab update is okay, but the mount point /mnt/data must exist; the sequence is otherwise correct, but best practice is to create mount point first. However, the missing mount point creation is a minor issue; still the command sequence works if directory exists. But option A includes mount -a which ensures persistence. However, option D is also plausible. The question expects A as the most complete.
- ✗
mkfs.ext4 /dev/sdc; lvcreate -L 5G -n lvdata vgdata; mount /dev/vgdata/lvdata /mnt/data; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab
Why it's wrong here
mkfs on /dev/sdc is wrong; LV must be created first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Red Hat often tests the assumption that the volume group and physical volume already exist, tricking candidates into adding unnecessary pvcreate/vgcreate steps that would disrupt existing configurations.
Trap categories for this question
Command / output trap
Mounting before fstab update is okay, but the mount point /mnt/data must exist; the sequence is otherwise correct, but best practice is to create mount point first. However, the missing mount point creation is a minor issue; still the command sequence works if directory exists. But option A includes mount -a which ensures persistence. However, option D is also plausible. The question expects A as the most complete.
Detailed technical explanation
How to think about this question
Under the hood, LVM uses a layered architecture: physical volumes (PVs) are block devices, volume groups (VGs) pool PVs, and logical volumes (LVs) are carved from VGs. The lvcreate command with -L 5G allocates extents from the VG's free space, and the LV appears as /dev/vgdata/lvdata. The mount -a command reads /etc/fstab and mounts all entries not already mounted, which is a safe way to test the fstab syntax without rebooting. In real-world scenarios, always verify fstab entries with mount -a to avoid boot failures.
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 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
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.
- →
Configure local storage — study guide chapter
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FAQ
Questions learners often ask
What does this EX200 question test?
Configure local storage — This question tests Configure local storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: lvcreate -L 5G -n lvdata vgdata; mkfs.ext4 /dev/vgdata/lvdata; echo '/dev/vgdata/lvdata /mnt/data ext4 defaults 0 0' >> /etc/fstab; mount -a — Option A is correct because it assumes the volume group vgdata and physical volume /dev/sdc already exist, so only the lvcreate command is needed to create the logical volume. It then formats the LV with ext4, adds a persistent mount entry to /etc/fstab, and uses mount -a to mount all filesystems from fstab, including the new entry. This sequence efficiently meets all requirements without redundant or incorrect steps.
What should I do if I get this EX200 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: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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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.
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