Intermediate
Docker & Containers
Q52 / 100
What does "docker system prune -a" do, and why should it be used carefully?
Correct! Well done.
Incorrect.
The correct answer is B) It removes all stopped containers, unused networks, dangling and unused images, and build cache — potentially deleting images that are not currently used by any container but might be needed later
B
Correct Answer
It removes all stopped containers, unused networks, dangling and unused images, and build cache — potentially deleting images that are not currently used by any container but might be needed later
Explanation
"docker system prune -a" aggressively reclaims disk space by removing all unused data, including images not referenced by any container, which could require re-downloading or rebuilding them later.
Progress
52/100