305-300 Container Virtualization Practice Question
Which command is used to stop all running containers?
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 stop $(docker ps -q)
'docker stop $(docker ps -q)' pipes the IDs of running containers to the stop command.
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 kill --all
Why it's wrong here
The kill command does not support --all.
- ✓
docker stop $(docker ps -q)
Why this is correct
This stops all containers currently identified by ps -q.
- ✗
docker rm -f *
Why it's wrong here
This attempts to remove containers but may fail if they aren't stopped.
- ✗
docker prune
Why it's wrong here
This removes unused resources, not running containers.
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.