305-300 Container Virtualization Practice Question
You are troubleshooting a problem where an LXC container cannot access its own /dev/null. What is a common cause in a non-root container?
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
✓
Missing mknod permission
Lack of device node creation in the container's /dev directory or improper cgroup permissions often causes this.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Missing mknod permission
Why this is correct
Containers often need to be able to create nodes if they aren't provided by default.
- ✗
Wrong kernel version
Why it's wrong here
/dev/null is standard.
- ✗
Host kernel panic
Why it's wrong here
This would affect the whole system.
- ✗
Insufficient RAM
Why it's wrong here
This would cause OOM, not device errors.
About these practice questions
One of 194 original 305-300 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official LPI exam blueprint
This 305-300 practice question is part of Courseiva's free LPI 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 305-300 exam.