Match each file system type to its description.
Drag a concept onto its matching description — or click a concept then click the description.
Default file system for RHEL 8/9 with journaling and support for large files
High-performance 64-bit journaling file system, default for /boot in RHEL 7
Copy-on-write file system with snapshots and compression (available in RHEL 8/9)
Used for virtual memory, typically as a partition or file
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ext4: Standard journaling file system for Linux.
In RHEL, ext4 is the standard journaling file system, XFS excels with large files, and Btrfs provides advanced features like snapshots. Swap is used for virtual memory, not data storage.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
ext4: Standard journaling file system for Linux.
Why this is correct
ext4 is the default journaling file system on most Linux distributions, building on its predecessor ext3 by adding extents, delayed allocation, and support for volumes up to 1 EiB and files up to 16 TiB. Its journal records metadata transactions before they are committed, which dramatically reduces the risk of corruption after an unclean shutdown. Backward compatibility allows ext2 and ext3 filesystems to be mounted as ext4, making it a straightforward, widely adopted choice for general-purpose storage.
XFS: High-performance file system supporting large files and parallel I/O.
Why this is correct
XFS is a 64-bit journaling file system originally developed by SGI, engineered for high scalability and throughput on large files and parallel I/O workloads. It uses allocation groups and b-tree indexing to maintain performance even as the filesystem grows, and supports files up to 8 EiB in size. With features like delayed allocation and preallocation, XFS excels in enterprise servers handling concurrent streaming data, making it the default root filesystem on Red Hat Enterprise Linux 7 and later.
Btrfs: Copy-on-write file system with snapshots, checksums, and compression.
Why this is correct
Btrfs is a modern copy-on-write (CoW) file system designed around advanced features rather than pure performance. Its CoW semantics enable instant, space-efficient snapshots and subvolumes, while checksums on every block detect silent data corruption and, when combined with RAID features, can self-heal damaged data. It also offers transparent compression (LZO, zlib, or ZSTD) and online resizing, allowing the filesystem capacity to be grown or shrunk without unmounting the volume.
swap: A file system used for storing temporary files (/var/tmp).
Why it's wrong here
Swap is not a file system at all; it is a dedicated partition or a specially formatted file that the Linux kernel uses as virtual memory to page out inactive memory pages when RAM is full. The /var/tmp directory is ordinary persistent storage for temporary user files, typically placed on the root or a dedicated filesystem, and is completely unrelated to swap usage. Therefore, describing swap as a file system for /var/tmp confuses virtual memory management with temporary file storage.
ext4: A file system that supports subvolumes and snapshots.
Why it's wrong here
While ext4 is the workhorse Linux filesystem with journaling and online growth, it does not provide subvolumes or snapshots; these capabilities belong to Btrfs. Subvolumes allow separate mountable tree instances within one filesystem, and snapshots create point-in-time views of the data, both of which are built upon Btrfs's copy-on-write design. This option is incorrect because it incorrectly credits ext4 with features that are unique to Btrfs, a distinction that often appears in filesystem comparison questions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.