EX200 Create and configure file systems Practice Question
This EX200 practice question tests your understanding of create and configure file systems. 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.
A server has an LVM volume group 'vg_data' with a logical volume 'lv_data' formatted as ext4. The administrator needs to increase the filesystem size by 2 GB without unmounting. Which set of commands should be used?
Option D is correct because the filesystem is ext4, which supports online resizing. The `lvextend` command first expands the logical volume by 2 GB, and then `resize2fs` grows the ext4 filesystem to fill the newly allocated space—all without unmounting.
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.
Correct: lvextend extends the LV, then resize2fs grows the filesystem online.
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 confuse the filesystem-specific resize commands—using `xfs_growfs` for ext4 or forgetting to run any filesystem resize command after extending the logical volume.
Trap categories for this question
Command / output trap
Incorrect: xfs_growfs is for XFS filesystems; this is ext4, and lvresize is not the standard command.
Detailed technical explanation
How to think about this question
The `resize2fs` command operates on the ext4 superblock and block group descriptors to expand the filesystem into the newly added logical volume extents. This online resize is possible because ext4 supports the `EXT4_FEATURE_COMPAT_RESIZE_INODE` feature, which allows in-kernel resizing while the filesystem is mounted. In contrast, XFS requires `xfs_growfs` and can only grow a mounted filesystem, but the command syntax differs.
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 +2G /dev/vg_data/lv_data && resize2fs /dev/vg_data/lv_data — Option D is correct because the filesystem is ext4, which supports online resizing. The `lvextend` command first expands the logical volume by 2 GB, and then `resize2fs` grows the ext4 filesystem to fill the newly allocated space—all without unmounting.
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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