EX188 Registry And Security Practice Question
Which TWO settings or files are critical when configuring rootless Podman environments on RHEL 9? (Choose two.)
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
✓
/etc/subuid and /etc/subgid for user namespace allocations.
Rootless Podman relies on subordinate UIDs/GIDs in /etc/subuid and /etc/subgid, and user configurations in ~/.config/containers/.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
/etc/selinux/config for enforcing SELinux mode.
Why it's wrong here
While SELinux is relevant, it is a system-wide setting, not specific to rootless namespace configuration files.
- ✗
/etc/sudoers for root privileges.
Why it's wrong here
Rootless Podman does not require sudo for normal container execution.
- ✓
/etc/subuid and /etc/subgid for user namespace allocations.
Why this is correct
Subordinate UID/GID ranges are mandatory for rootless namespace mapping.
- ✗
/etc/shadow for root password hashes.
Why it's wrong here
/etc/shadow is unrelated to rootless container user namespace mechanics.
- ✓
~/.config/containers/registries.conf for user-specific registry configurations.
Why this is correct
Rootless users configure local registries in their home directory config path.
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.