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DCA · Question #63
DCA Question #63: Real Exam Question with Answer & Explanation
The correct answer is A: Yes. The user Linux kernel namespace is disabled by default in Docker and needs to be explicitly enabled at engine runtime to provide rootless container execution.
Submitted by ahmad_uae· Apr 18, 2026Security
Question
Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used? Solution: user
Options
- AYes
- BNo
Explanation
The user Linux kernel namespace is disabled by default in Docker and needs to be explicitly enabled at engine runtime to provide rootless container execution.
Common mistakes.
- B. The
usernamespace is specifically designed for enhanced security through user ID remapping and is an opt-in feature, not enabled by default in Docker.
Concept tested. Docker user namespaces
Reference. https://docs.docker.com/engine/security/userns-remap/
Topics
#Linux Namespaces#User Namespaces#Docker Security#Engine Configuration
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