305-300 Container Virtualization Practice Question
When cleaning up Docker resources, which command will remove all stopped containers, unused networks, and dangling images in one step?
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
✓
docker system prune
docker system prune removes all unused data, which is the most efficient cleanup method.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
docker container prune
Why it's wrong here
This only removes containers, not images or networks.
- ✗
docker volume prune
Why it's wrong here
This only cleans up unused volumes.
- ✗
docker image prune -a
Why it's wrong here
This only cleans up images.
- ✗
docker cleanup
Why it's wrong here
This is not a native docker command.
- ✓
docker system prune
Why this is correct
This command cleans up the entire environment of unused resources.
About these practice questions
Courseiva writes every 305-300 question from scratch — 194 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. 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.