Linux Advanced File System and Storage 5

Question 1

What does the 'dumpe2fs' command do?

Accepted Answer

Dumps ext2/3/4 filesystem superblock and block group information

Answer

dumpe2fs prints the superblock and block group descriptor table information for an ext2/3/4 filesystem.

Question 2

Which NFS mount option ensures that all file operations on the client are completed before returning to the application?

Accepted Answer

sync

Answer

The sync mount option forces synchronous I/O so all writes are committed to the server before the client returns control to the application.

Question 3

What is the role of the journal in an ext3/ext4 filesystem?

Accepted Answer

Records metadata changes before they are committed, ensuring consistency after a crash

Answer

The journal (write-ahead log) records pending metadata or data changes so the filesystem can replay or discard them after an unclean shutdown.

Question 4

Which command permanently removes an LVM Logical Volume?

Accepted Answer

lvremove

Answer

lvremove deactivates and permanently deletes a Logical Volume and all its data from the Volume Group.

Question 5

What is the effect of mounting a filesystem with the 'ro' option?

Accepted Answer

Mounts the filesystem in read-only mode, preventing any writes

Answer

The ro mount option causes the kernel to mount the filesystem read-only, so no modifications can be made to files or directories.

Linux Practice Test