Which filesystem is the default in Red Hat installations?

• A. ext4
• B. XFS
• C. NTFS
• D. Btrfs

Answer: (A)

The default filesystem used by Red Hat installations is XFS. This choice reflects XFS’s strengths for enterprise workloads: it scales well to very large filesystems and storage setups, handles large directories efficiently, and supports online resizing, which makes managing growing servers easier. These capabilities align with the common Red Hat use cases of large storage arrays and demanding performance requirements, making XFS a reliable, high-performance default.

Ext4 is a solid, general-purpose filesystem and is widely supported, but Red Hat has chosen XFS as the default to better optimize for large-scale storage and enterprise performance. NTFS is the Windows filesystem and isn’t used as a native Linux root filesystem. Btrfs offers features like snapshots and checksums, but Red Hat historically did not set it as the default due to stability and maturity considerations at the time; it may be available in some configurations but not the default.