Docker Certified Associate Test Review Questions Set 1 - Image Creation
Docker Certified Associate Test Review Questions Set 1 - Domain 2: Image Creation, Management, and Registry
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Question 1
Which of the Dockerfile options initializes a new build stage and sets the base image for subsequent instructions?
A
CMD
B
ONBUILD
C
RUN
D
FROM
Question 1 Explanation:
see Dockerfile reference (https://docs.docker.com/engine/reference/builder/)
Question 2
What Dockerfile option EXPOSE does?
A
Adds metadata to an image
B
Label a container that will run as an executable
C
Informs Docker that the container listens on the specified network ports at runtime
D
Expose defaults for an executing container
Question 3
Which of the following is NOT how to create an efficient image via a Dockerfile?
A
Use multi-stage builds
B
Combine multiple applications into a single container
C
Avoid installing unnecessary packages
D
Start with an appropriate base image
Question 4
Which of the following Dockerfile options creates a mount point with the specified name and marks it as holding externally mounted volumes from native host or other containers?
A
ONBUILD
B
VOLUME
C
RUN
D
WORKDIR
Question 5
What docker image prune command does?
A
Remove one or more images
B
Show the history of an image
C
Remove unused images
D
Display detailed information on one or more images
Question 6
What Dockerfile option LABEL does?
A
Label a container that will run as an executable
B
Tells Docker how to test a container to check that it is still working
C
Provide defaults for an executing container
D
Adds metadata to an image
Question 7
Which of the Dockerfile options executes any commands in a new layer on top of the current image and commit the results?
A
RUN
B
FROM
C
CMD
D
ONBUILD
Question 8
Dockerfile option EXPOSE publish the port to external systems. True or false?
A
True
B
False
Question 9
Which of the following docker image commands display detailed information on one or more images?
A
docker image detail
B
docker image ls
C
docker image inspect
D
docker image history
Question 10
What does docker image rm command do?
A
Display detailed information on one or more images
B
Remove one or more images
C
Remove unused images
D
Show the history of an image
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