XK0-006 System Management Practice Question
A Linux administrator needs to identify which of the following filesystems are journaling filesystems commonly used in Linux. (Choose three.)
⚠ Common exam trap
XK0-006 often tests the distinction between journaling filesystems and non-journaling ones (FAT32) or non-filesystems (swap), catching candidates who assume any Linux storage technology counts as a journaling filesystem.
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
✓
ext4
ext4 (B) is a journaling filesystem that maintains a journal to record metadata changes before committing them, enabling fast recovery after crashes, and it is the default on many Linux distributions. btrfs (D) is a copy-on-write filesystem with built-in journaling-like consistency via its COW transaction mechanism, widely used in Linux for snapshots and checksumming. xfs (E) is a high-performance journaling filesystem developed by SGI and commonly used in Linux for large files and parallel I/O. swap (A) is not a filesystem for storing files but a raw swap space used for virtual memory paging, and FAT32 (C) is a non-journaling filesystem from the FAT family that lacks journaling and metadata consistency features.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
swap
Why it's wrong here
swap is a raw swap area, not a filesystem, and it maintains no journal; it stores evicted memory pages. It is tempting because swap appears in filesystem listings and partitioning tools, so it would be the right answer when asked which entry is a swap partition rather than a journaling filesystem.
- ✓
ext4
Why this is correct
ext4 is a journaling filesystem: it maintains a journal recording pending metadata changes, so it is commonly used on Linux and satisfies the requirement to identify journaling filesystems. Its predecessor ext3 also journals, but ext4 adds extents and larger volume support.
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FAT32
Why it's wrong here
FAT32 keeps a file allocation table with no journal, so it cannot replay metadata after an unclean unmount. It is tempting because FAT32 is a widely used filesystem on removable media, so it would be correct when the question asks about portable, cross-platform storage rather than journaling Linux filesystems.
- ✓
btrfs
Why this is correct
Btrfs is a copy-on-write filesystem that maintains journal-like metadata and data integrity through checksumming and atomic transactions, satisfying the requirement for journaling filesystems commonly used in Linux. It is a standard modern Linux filesystem, so it qualifies alongside ext4 and XFS as a correct selection.
- ✓
xfs
Why this is correct
xfs is a journaling filesystem that logs metadata operations to guarantee consistency after crashes, and it is commonly used on Linux. This satisfies the requirement to identify journaling filesystems, distinguishing it from non-journaling types such as vfat.
Go deeper
Related to this question
Learn chapter
Navigating the Filesystem
Key term
XFS
XFS is a high-performance 64-bit journaling file system created by Silicon Graphics (SGI) and designed for large files, high throughput, and parallel I/O.
Key term
Btrfs
Btrfs is a modern copy-on-write file system for Linux that focuses on data integrity, snapshots, and advanced storage features.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.