DCA Practice Questions - Docker Certified Associate (DCA) Exam - Variant 1 - DCA Practice Questions - Docker Certified Associate (DCA) Exam

Question 1

Which Dockerfile instruction sets the base image for a build?

FROM BASE IMAGE START

Correct Answer:

FROM

Question 2

What is the difference between the COPY and ADD instructions in a Dockerfile?

ADD supports URL sources and automatic tar extraction; COPY only copies local files and directories COPY supports URL sources; ADD only copies local files ADD is faster than COPY COPY creates a new layer; ADD does not

Correct Answer:

ADD supports URL sources and automatic tar extraction; COPY only copies local files and directories

Question 3

What is the purpose of the RUN instruction in a Dockerfile?

Executes a command in a new layer on top of the current image and commits the result Sets the default command to run when a container starts Defines environment variables Exposes a port

Correct Answer:

Executes a command in a new layer on top of the current image and commits the result

Question 4

What is the difference between CMD and ENTRYPOINT in a Dockerfile?

ENTRYPOINT defines the fixed executable; CMD provides default arguments that can be overridden at runtime CMD defines the fixed executable; ENTRYPOINT provides overridable defaults They are interchangeable ENTRYPOINT is only used in multi-stage builds

Correct Answer:

ENTRYPOINT defines the fixed executable; CMD provides default arguments that can be overridden at runtime

Question 5

What does the EXPOSE instruction in a Dockerfile do?

Documents which port the container listens on at runtime but does NOT publish it to the host Publishes the port to the host automatically Opens the port in the host firewall Maps the container port to a random host port

Correct Answer:

Documents which port the container listens on at runtime but does NOT publish it to the host

Question 1

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Prepare with the DCA Practice Questions - Docker Certified Associate (DCA) Exam - Variant 1 practice quiz. This question bank includes 100 questions covering docker, swarm, dockerfile, command, and network. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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DCA Practice Questions - Docker Certified Associate (DCA) Exam - Variant 1

This practice set contains 100 questions from the matching question bank and focuses on docker, swarm, dockerfile, command, and network. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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DCA Practice Questions - Docker Certified Associate (DCA) Exam - Variant 1

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