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.
Which TWO of the following are valid mount options for enabling quotas on an ext4 file system?
grpquota
grpquota enables per-group quotas on ext4.
quota
Why wrong: 'quota' is not a valid mount option; the specific options usrquota or grpquota are required.
userquota
Why wrong: 'userquota' is not a valid mount option; the correct term is 'usrquota'.
noquota
Why wrong: 'noquota' is not a valid mount option for ext4.
usrquota
usrquota enables per-user quotas on ext4.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
grpquota
Option A is correct because `grpquota` is a valid mount option for enabling group quotas on an ext4 file system. Option E is correct because `usrquota` is the valid mount option for enabling user quotas. Both options are recognized by the `mount` command and the ext4 driver to activate quota tracking at mount time.
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.
grpquota
Why this is correct
grpquota enables per-group quotas on ext4.
Related concept
Read the scenario before looking for a memorised answer.
quota
Why it's wrong here
'quota' is not a valid mount option; the specific options usrquota or grpquota are required.
userquota
Why it's wrong here
'userquota' is not a valid mount option; the correct term is 'usrquota'.
noquota
Why it's wrong here
'noquota' is not a valid mount option for ext4.
usrquota
Why this is correct
usrquota enables per-user quotas on ext4.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates confuse the generic `quota` command with a mount option, or misremember the exact option names (e.g., `userquota` instead of `usrquota`), leading them to select incorrect options like `quota` or `userquota`.
Detailed technical explanation
Under the hood, when `usrquota` or `grpquota` is specified as a mount option, the ext4 filesystem driver initializes quota inodes (inode numbers 3 for user and 4 for group) and enables quota accounting and enforcement. The `quota` command-line tool (e.g., `quotaon`, `quotaoff`) can also be used to enable quotas after mounting, but the mount option provides automatic activation at mount time. In a real-world scenario, using mount options ensures quotas are active immediately after a reboot without manual intervention.
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
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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: grpquota — Option A is correct because `grpquota` is a valid mount option for enabling group quotas on an ext4 file system. Option E is correct because `usrquota` is the valid mount option for enabling user quotas. Both options are recognized by the `mount` command and the ext4 driver to activate quota tracking at mount time.
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Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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