This LPIC-1 practice question tests your understanding of devices, filesystems and fhs. 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 create an ext4 filesystem on a partition?
mkfs.btrfs /dev/sdb1
Why wrong: Creates Btrfs, not ext4.
mkfs.ext4 /dev/sdb1
Explicitly creates ext4 filesystem.
mke2fs -t ext4 /dev/sdb1
mke2fs with -t ext4 creates ext4.
mkfs.msdos /dev/sdb1
Why wrong: Creates FAT filesystem.
mkfs.xfs /dev/sdb1
Why wrong: Creates XFS, not 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
mkfs.ext4 /dev/sdb1
The `mkfs.ext4` command is a direct front-end for creating an ext4 filesystem, making option B correct. Option C is also correct because `mke2fs -t ext4` explicitly calls the ext2/3/4 filesystem creation tool with the ext4 type, producing an identical ext4 filesystem. Both commands ultimately invoke the same underlying `mke2fs` utility with the appropriate filesystem type.
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.
mkfs.btrfs /dev/sdb1
Why it's wrong here
Creates Btrfs, not ext4.
mkfs.ext4 /dev/sdb1
Why this is correct
Explicitly creates ext4 filesystem.
Related concept
Read the scenario before looking for a memorised answer.
mke2fs -t ext4 /dev/sdb1
Why this is correct
mke2fs with -t ext4 creates ext4.
Related concept
Read the scenario before looking for a memorised answer.
mkfs.msdos /dev/sdb1
Why it's wrong here
Creates FAT filesystem.
mkfs.xfs /dev/sdb1
Why it's wrong here
Creates XFS, not ext4.
Common exam traps
The trap here is that candidates may think only `mkfs.ext4` is valid, overlooking that `mke2fs -t ext4` is an equivalent command, or they may confuse filesystem-specific mkfs wrappers (like `mkfs.btrfs` or `mkfs.xfs`) as being able to create ext4 filesystems.
Detailed technical explanation
Under the hood, `mkfs.ext4` is a symlink or wrapper that calls `mke2fs -t ext4`, which writes the ext4 superblock, inode table, and journaling structures to the partition. In real-world scenarios, using `mke2fs -t ext4` allows additional fine-tuning via options like `-O` for specific ext4 features (e.g., `^has_journal` to disable the journal), while `mkfs.ext4` is simpler for default setups.
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 LPIC-1 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
Devices, Filesystems and FHS — This question tests Devices, Filesystems and FHS — Read the scenario before looking for a memorised answer..
The correct answer is: mkfs.ext4 /dev/sdb1 — The `mkfs.ext4` command is a direct front-end for creating an ext4 filesystem, making option B correct. Option C is also correct because `mke2fs -t ext4` explicitly calls the ext2/3/4 filesystem creation tool with the ext4 type, producing an identical ext4 filesystem. Both commands ultimately invoke the same underlying `mke2fs` utility with the appropriate filesystem type.
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 25, 2026
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.
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