EX188 Registry And Security Practice Question
A container running in rootless mode needs to map a user account on the host to a different user inside the container namespace. Which options configure UID and GID mapping?
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
✓
--uidmap and --gidmap
UID/GID mappings are configured using --uidmap and --gidmap.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
--userns-map and --groupmap
Why it's wrong here
These are not the correct option names.
- ✓
--uidmap and --gidmap
Why this is correct
--uidmap and --gidmap explicitly define how container UIDs/GIDs map to host UIDs/GIDs.
- ✗
--user-namespace-file
Why it's wrong here
Namespace mapping is handled via command-line mapping flags or subuid/subgid files.
- ✗
--map-user and --map-group
Why it's wrong here
These flags do not exist in Podman.
About these practice questions
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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 Red Hat exam blueprint
This EX188 practice question is part of Courseiva's free Red Hat 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 EX188 exam.