EX188 Container Image Building Practice Question
Which user instruction changes the user name or UID and group name or GID to use when running subsequent instructions in the Containerfile?
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
✓
USER
The USER instruction sets the user name or UID to use for running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
LOGIN
Why it's wrong here
LOGIN is not a valid instruction.
- ✗
IDENTITY
Why it's wrong here
IDENTITY is not a valid instruction.
- ✓
USER
Why this is correct
USER sets the execution user context.
- ✗
ACCOUNT
Why it's wrong here
ACCOUNT is not a valid instruction.
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.