EX188 Container Image Building Practice Question
An administrator needs to execute a package update and install dependencies during the podman build process, ensuring these commands are committed as a new layer in the final image. Which instruction accomplishes this?
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
✓
RUN
The RUN instruction executes any commands in a current layer on top of the current image and commits the results. The resulting committed image will be used for the next step in the Containerfile.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
EXEC
Why it's wrong here
EXEC is not a valid instruction in Containerfiles.
- ✗
START
Why it's wrong here
START is not a recognized Containerfile instruction.
- ✗
CMD
Why it's wrong here
CMD sets default commands to run when a container starts, not during the build process.
- ✓
RUN
Why this is correct
RUN executes build-time commands and commits the result to a new image layer.
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.