This EX200 practice question tests your understanding of configure local storage. 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 command shows the amount of disk space used and available on each mounted filesystem?
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.
fdisk -l
Why wrong: fdisk -l shows partition tables.
df -h
df -h shows disk space usage for mounted filesystems.
du -sh
Why wrong: du -sh shows directory space usage, not all filesystems.
lsblk
Why wrong: lsblk lists block devices, not filesystem usage.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
df -h
The `df -h` command displays disk space usage for all mounted filesystems, showing total, used, and available space in human-readable format (e.g., GB, MB). This directly answers the question about disk space on each mounted filesystem.
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.
fdisk -l
Why it's wrong here
fdisk -l shows partition tables.
df -h
Why this is correct
df -h shows disk space usage for mounted filesystems.
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.
du -sh
Why it's wrong here
du -sh shows directory space usage, not all filesystems.
lsblk
Why it's wrong here
lsblk lists block devices, not filesystem usage.
Common exam traps
The trap here is that candidates confuse `df` (filesystem-level space) with `du` (directory-level usage) or `fdisk` (partition table), leading them to pick a command that does not report available space on mounted filesystems.
Trap categories for this question
Command / output trap
fdisk -l shows partition tables.
Detailed technical explanation
Under the hood, `df` reads the statvfs() system call for each mounted filesystem to retrieve block counts (total, free, available) and block size, then calculates usage. The `-h` flag applies human-readable suffixes (e.g., 1K, 234M, 2G) using powers of 1024. A subtle behavior: `df` shows available space for unprivileged users (reserved blocks for root are excluded), so root may see slightly more available space than shown.
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Configure local storage — This question tests Configure local storage — Read the scenario before looking for a memorised answer..
The correct answer is: df -h — The `df -h` command displays disk space usage for all mounted filesystems, showing total, used, and available space in human-readable format (e.g., GB, MB). This directly answers the question about disk space on each mounted filesystem.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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