LFCS Storage Management Practice Question
Exhibit
# device UUID mountpoint type options dump pass UUID=abc123 /boot ext4 defaults 1 2 UUID=def456 / ext4 defaults 1 1 UUID=ghi789 /home xfs defaults 0 0 UUID=jkl012 none swap sw 0 0 /dev/mapper/vg_data-lv_data /data ext4 defaults 0 2 //192.168.1.100/share /mnt/nfs nfs defaults 0 0
Refer to the exhibit. An administrator attempts to mount all filesystems using mount -a, but it fails. The error message indicates that UUID=jkl012 is not found. Which of the following is the most likely cause?
⚠ Common exam trap
Linux Foundation often tests the misconception that mount -a only mounts regular filesystems, when in fact it also processes swap entries, so candidates overlook swap as the cause of a UUID error.
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
✓
The swap partition is not formatted or missing.
The error 'UUID=jkl012 not found' indicates that the system cannot locate a device with that UUID. Since the swap partition is typically referenced by UUID in /etc/fstab and is not required for normal filesystem mounting, a missing or unformatted swap partition would cause mount -a to fail when it tries to mount the swap entry. This is the most likely cause because swap is often the only filesystem that can be missing without affecting other mounts, yet mount -a processes all entries including swap.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The swap partition is not formatted or missing.
Why this is correct
Correct cause.
- ✗
The /dev/mapper/vg_data-lv_data device does not exist.
Why it's wrong here
Would cause different error.
- ✗
The NFS share is unreachable.
Why it's wrong here
Would cause a different error.
- ✗
The /home filesystem type is incorrect.
Why it's wrong here
Would cause different error.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation 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 LFCS exam.