EX188 Container Image Building Practice Question
Which TWO of the following instructions in a Containerfile can be written using either the shell form or the exec form?
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
Both RUN, CMD, and ENTRYPOINT support both shell form (e.g., RUN yum update) and exec form (e.g., RUN ["yum", "update"]). Among the options, RUN and CMD are standard examples.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
WORKDIR
Why it's wrong here
WORKDIR accepts a directory path string, not shell/exec forms.
- ✓
RUN
Why this is correct
RUN supports both shell form and exec form.
- ✗
FROM
Why it's wrong here
FROM does not use exec form; it takes base image specifications.
- ✓
CMD
Why this is correct
CMD supports both shell form and exec form.
- ✗
ENV
Why it's wrong here
ENV uses key-value pairs and does not use shell or exec instruction syntax forms.
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.