EX200 Create and configure file systems Practice Question
This EX200 practice question tests your understanding of create and configure file systems. 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.
A system administrator needs to extend an existing logical volume 'lv_data' in volume group 'vg_data'. The administrator has already added a new physical volume /dev/sdd1 to the volume group. Which sequence of commands should be used to complete the extension and ensure the filesystem is usable?
Option B is correct because after adding a physical volume to the volume group, the logical volume must be extended with `lvextend`, and then the filesystem must be resized with `resize2fs` to use the new space. The filesystem remains mounted and usable throughout; no remount or filesystem recreation is needed.
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.
✗
lvextend -L +10G /dev/vg_data/lv_data; mount /dev/vg_data/lv_data; resize2fs /dev/vg_data/lv_data
Why it's wrong here
Incorrect: mount is unnecessary and may cause issues.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think they need to remount the filesystem (Option A) or recreate it (Option C) after extending the logical volume, but in Red Hat Enterprise Linux, `resize2fs` can grow an ext4 filesystem online without unmounting.
Detailed technical explanation
How to think about this question
The `resize2fs` command operates on the filesystem metadata to expand it into the newly allocated logical volume extents; for ext4, this can be done online while the filesystem is mounted. The `lvextend` command with `-L +10G` allocates free physical extents from the volume group, which must already have available space from the added PV. If the filesystem were XFS instead of ext4, the correct command would be `xfs_growfs` instead of `resize2fs`.
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.
Create and configure file systems — This question tests Create and configure file systems — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: lvextend -L +10G /dev/vg_data/lv_data; resize2fs /dev/vg_data/lv_data — Option B is correct because after adding a physical volume to the volume group, the logical volume must be extended with `lvextend`, and then the filesystem must be resized with `resize2fs` to use the new space. The filesystem remains mounted and usable throughout; no remount or filesystem recreation is needed.
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.
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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