- A
blkid
Why wrong: blkid displays block device attributes (UUID, label), not disk space usage.
- B
df -h
df -h correctly shows available disk space on mounted filesystems in human-readable format.
- C
ls -lh
Why wrong: ls -lh lists file sizes, not filesystem disk space.
- D
du -sh
Why wrong: du -sh shows the total size of a directory or file, not available space on mounted filesystems.
- E
fdisk -l
Why wrong: fdisk -l displays partition tables, not filesystem usage.
Question 427 of 537
How to Display Available Disk Space in Human-Readable Format
This EX200 practice question tests your understanding of deploy, configure, and maintain 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 commands can be used to display available disk space on mounted filesystems in a human-readable format?
Answer choices
Why each option matters
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 mounted filesystems, with the `-h` flag converting sizes into human-readable units (e.g., KB, MB, GB). This directly meets the requirement of showing available disk space on mounted filesystems in a human-readable format. The `du -sh` command shows the total disk usage of a specific directory or file, not available space on filesystems, so it does not satisfy the question's requirement.
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.
- ✗
blkid
Why it's wrong here
blkid displays block device attributes (UUID, label), not disk space usage.
- ✓
df -h
Why this is correct
df -h correctly shows available disk space on mounted filesystems in human-readable format.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
ls -lh
Why it's wrong here
ls -lh lists file sizes, not filesystem disk space.
- ✗
du -sh
Why it's wrong here
du -sh shows the total size of a directory or file, not available space on mounted filesystems.
- ✗
fdisk -l
Why it's wrong here
fdisk -l displays partition tables, not filesystem usage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is that `du -sh` shows directory usage, not available space on filesystems. Candidates may mistakenly think it shows available space, but only `df -h` directly provides that information.
Trap categories for this question
Command / output trap
du -sh shows the total size of a directory or file, not available space on mounted filesystems.
Detailed technical explanation
How to think about this question
The `df` command reads filesystem statistics from the `/proc/mounts` file and the `statfs()` system call, which provides total, used, and available blocks. The `-h` flag applies powers-of-1024 suffixes (e.g., GiB, MiB) per the IEC standard, ensuring output is scaled appropriately for human interpretation. In contrast, `du -sh` (also correct) summarizes disk usage of directories/files, not available space on filesystems, but both commands are valid for displaying human-readable disk-related information.
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.
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FAQ
Questions learners often ask
What does this EX200 question test?
Deploy, configure, and maintain systems — This question tests Deploy, configure, and maintain systems — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: df -h — The `df -h` command displays disk space usage for mounted filesystems, with the `-h` flag converting sizes into human-readable units (e.g., KB, MB, GB). This directly meets the requirement of showing available disk space on mounted filesystems in a human-readable format. The `du -sh` command shows the total disk usage of a specific directory or file, not available space on filesystems, so it does not satisfy the question's requirement.
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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Last reviewed: Jun 24, 2026
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