This EX200 practice question tests your understanding of deploy, configure, and maintain systems. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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?
blkid
Why wrong: Shows block device attributes, not disk usage.
df -h
Disks space usage for filesystems.
ls -lh
Why wrong: Shows file sizes but not total disk space.
du -sh
Shows total size of a directory.
fdisk -l
Why wrong: Displays partition table, not used space.
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 mounted filesystems, with the `-h` flag converting sizes into human-readable units (e.g., KB, MB, GB). This directly answers the requirement to show available disk space on mounted filesystems in a human-readable format.
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.
blkid
Why it's wrong here
Shows block device attributes, not disk usage.
df -h
Why this is correct
Disks space usage for filesystems.
Related concept
Read the scenario before looking for a memorised answer.
ls -lh
Why it's wrong here
Shows file sizes but not total disk space.
du -sh
Why this is correct
Shows total size of a directory.
Related concept
Read the scenario before looking for a memorised answer.
fdisk -l
Why it's wrong here
Displays partition table, not used space.
Common exam traps
The trap here is that candidates often confuse `du -sh` (which shows used space for a specific directory) with `df -h` (which shows available space on filesystems), but both are correct in this question because `du -sh` can be used to display disk usage in human-readable format, though it does not show available space directly.
Trap categories for this question
Command / output trap
Shows block device attributes, not disk usage.
Detailed technical explanation
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.
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
Deploy, configure, and maintain systems — This question tests Deploy, configure, and maintain systems — Read the scenario before looking for a memorised answer..
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 answers the requirement to show available disk space on mounted filesystems in a human-readable format.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This EX200 practice question is part of Courseiva's free Red Hat certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the EX200 exam.
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