easyMultiple SelectObjective-mapped
XK0-006 Practice Question: A Linux system fails to boot with the error 'No…
A Linux system fails to boot with the error 'No bootable device found'. Which two troubleshooting steps should be taken? (Select TWO).
⚠ Common exam trap
A common mix-up: candidates confuse filesystem corruption (fsck) or kernel issues with bootloader problems, but the 'No bootable device found' error specifically points to the firmware's inability to locate a bootable partition or bootloader, not to filesystem or kernel corruption.
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
✓
Verify the GRUB configuration
The error 'No bootable device found' indicates that the system's BIOS/UEFI cannot locate a valid bootloader or operating system on any available storage device. Verifying the boot order in BIOS/UEFI (Option E) ensures that the correct disk is set as the first boot device, which is a common cause of this error. Checking the GRUB configuration (Option D) is also critical because if GRUB is missing, corrupted, or misconfigured, the system will not find a bootable kernel, even if the disk is correctly detected.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Check the SATA cable connections
Why it's wrong here
Cable issues would typically cause disk not detected, but 'No bootable device' often indicates bootloader problem.
- ✗
Reinstall the kernel
Why it's wrong here
Kernel reinstallation is unnecessary and may not resolve bootloader issues.
- ✗
Run fsck on the root filesystem
Why it's wrong here
Filesystem checks are for corruption, not missing boot device.
- ✓
Verify the GRUB configuration
Why this is correct
Corrupted or missing GRUB can cause 'No bootable device' error.
- ✓
Check the boot order in BIOS/UEFI
Why this is correct
Incorrect boot order can prevent the system from finding the boot device.
Go deeper
Related to this question
Learn chapter
Linux Fundamentals and History
Key term
Linux
Linux is an open-source operating system that manages computer hardware and software, widely used in servers, desktops, and embedded systems.
Key term
GRUB
GRUB (Grand Unified Bootloader) is a boot loader package that loads and manages the operating system startup process on Linux and other Unix-like systems.
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Written by Johnson Ajibi, MSc IT Security
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