305-300 Container Virtualization Practice Question
You are building a multi-stage Dockerfile and want to copy a binary from the 'builder' stage to the final stage. Which syntax 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 --from=builder /bin/app /bin/app
'COPY --from=stage_name source destination' is the syntax for multi-stage copying.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ADD --from=builder /bin/app /bin/app
Why it's wrong here
ADD is not typically used for stage copying.
- ✓
COPY --from=builder /bin/app /bin/app
Why this is correct
This correctly copies the file from the named builder stage.
- ✗
COPY builder:/bin/app /bin/app
Why it's wrong here
This syntax is invalid.
- ✗
COPY --stage=builder /bin/app /bin/app
Why it's wrong here
The --stage flag does not exist.
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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 LPI exam blueprint
This 305-300 practice question is part of Courseiva's free LPI 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 305-300 exam.