EX200 Create and configure file systems Practice Question
This EX200 practice question tests your understanding of create and configure file systems. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Network Topology
The administrator attempts to run 'xfs_growfs /dev/vg00/lvol1' but receives an error. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The logical volume is not mounted
The `xfs_growfs` command requires the XFS filesystem to be mounted in order to resize it. If the logical volume `/dev/vg00/lvol1` is not mounted, the kernel cannot access the filesystem's superblock and allocation group information, causing the command to fail with an error such as 'XFS filesystem not mounted' or 'No such file or directory'.
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.
✗
The file system is not XFS
Why it's wrong here
The command would fail with a different error if the file system type were not XFS.
✗
Unmet dependencies
Why it's wrong here
There is no dependency issue indicated.
✗
The volume group is full
Why it's wrong here
The error is not related to space in the volume group.
✓
The logical volume is not mounted
Why this is correct
xfs_growfs requires the file system to be mounted. The attribute for lvol1 does not include 'o', indicating it is not open (mounted).
Clue confirmation
The clue word "most likely" in the question point toward this answer.
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 often assume `xfs_growfs` works like `resize2fs` for ext4, which can resize unmounted filesystems, but XFS requires the filesystem to be mounted for online growth, and the error message may be misinterpreted as a missing package or wrong filesystem type.
Trap categories for this question
Command / output trap
The command would fail with a different error if the file system type were not XFS.
Detailed technical explanation
How to think about this question
Under the hood, `xfs_growfs` operates by calling the `XFS_IOC_FSGROWFSDATA` ioctl on the mounted filesystem's block device, which requires an open file descriptor to the mount point. The command does not interact with LVM directly; it relies on the kernel's XFS driver to read the current size from the superblock and extend the filesystem to the device's full size. A real-world scenario is when an administrator extends a logical volume with `lvextend` but forgets to mount the filesystem before running `xfs_growfs`, leading to a confusing error that is easily resolved by mounting the volume first.
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: The logical volume is not mounted — The `xfs_growfs` command requires the XFS filesystem to be mounted in order to resize it. If the logical volume `/dev/vg00/lvol1` is not mounted, the kernel cannot access the filesystem's superblock and allocation group information, causing the command to fail with an error such as 'XFS filesystem not mounted' or 'No such file or directory'.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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