XK0-006 Automation, Orchestration, and Scripting Practice Question
A developer is writing a Dockerfile. The application requires a configuration file that should be copied from the build context and the container should expose port 8080. Which combination of Dockerfile instructions is correct?
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
✓
COPY config.txt /app/ and EXPOSE 8080
COPY adds files from the build context, and EXPOSE documents the port. Other instructions serve different purposes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
COPY config.txt /app/ and EXPOSE 8080
Why this is correct
Correct. COPY copies the file, EXPOSE documents the port.
- ✗
ADD config.txt /app/ and WORKDIR 8080
Why it's wrong here
WORKDIR sets the working directory, not port exposure.
- ✗
ADD config.txt /app/ and RUN expose 8080
Why it's wrong here
RUN is not used to expose ports; EXPOSE is the correct instruction.
- ✗
COPY config.txt /app/ and CMD 8080
Why it's wrong here
CMD defines the default command, not port exposure.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.