easyMultiple ChoiceObjective-mapped
XK0-006 Practice Question: That their system is unable to boot after a…
A user reports that their system is unable to boot after a recent kernel update. The system displays a 'kernel panic' message. Which of the following is the MOST efficient way to boot into a previous kernel version?
⚠ Common exam trap
The trap here is that candidates may overcomplicate the solution by choosing systemd rescue mode or chroot, not realizing that GRUB's menu provides the simplest and fastest way to revert to a working kernel without any additional recovery steps.
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
✓
Select an older kernel from the GRUB menu
The GRUB bootloader stores multiple kernel versions after an update, allowing you to select a previous kernel from its menu at boot time. Choosing an older kernel bypasses the faulty new kernel without requiring additional tools or recovery media, making it the most efficient method to resolve a kernel panic caused by a recent update.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Select an older kernel from the GRUB menu
Why this is correct
GRUB typically lists older kernel entries, allowing quick selection of a working kernel.
- ✗
Use the systemd rescue mode
Why it's wrong here
Rescue mode may not help with kernel panic; it provides limited recovery options.
- ✗
Reinstall the operating system
Why it's wrong here
Reinstalling is drastic and unnecessary; a previous kernel can be used.
- ✗
Boot from a live CD and chroot
Why it's wrong here
This is more invasive and time-consuming; not the most efficient method.
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Related to this question
Learn chapter
User and Group Administration
Key term
Kernel
The kernel is the core program of an operating system that manages hardware resources and provides essential services for all other software to run.
Key term
User
A user is any person, system, or device that interacts with an IT service, resource, or identity system, typically authenticated through credentials and authorized to perform specific actions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.