Docker Fundamentals

Learn Docker basics with questions on images, containers, Dockerfiles, volumes, networking, and multi-stage builds. Perfect for developers getting started with containerization.

EASY7 questions10 minDevOps

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1.What is the difference between a Docker image and a Docker container?

An image is a read-only template; a container is a running instance of an image

An image is a running process; a container is a stored file

They are the same thing with different names

A container is for development; an image is for production

EASYMultiple Choice

2.Which Dockerfile instruction sets the command that runs when a container starts?

CMD

RUN

COPY

EXPOSE

EASYMultiple Choice

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

ENTRYPOINT sets the main executable; CMD provides default arguments that can be overridden at runtime

CMD runs during build time; ENTRYPOINT runs at container start

They are identical and interchangeable

ENTRYPOINT is deprecated in favor of CMD

MEDIUMMultiple Choice

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