EX188 Container Image Building Practice Question
You want to set the working directory for any subsequent RUN, CMD, ENTRYPOINT, COPY, and ADD instructions that follow it in the Containerfile. Which instruction achieves 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
✓
WORKDIR
The WORKDIR instruction sets the working directory for any RUN, CMD, ENTRYPOINT, COPY, and ADD instruction that follows it 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.
- ✗
DIR
Why it's wrong here
DIR is not a valid Containerfile instruction.
- ✓
WORKDIR
Why this is correct
WORKDIR changes the active directory context for subsequent instructions.
- ✗
CD
Why it's wrong here
The standard shell command cd does not persist across Containerfile instructions; WORKDIR must be used.
- ✗
PATH
Why it's wrong here
PATH modifies environment variables for executable search paths, not the working directory.
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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.