Docker Test 2

Question 1

When a Container is formed from an image, which Dockerfile command is specified as the default application?

Accepted Answer

ENTRYPOINT

Answer

Explanation:
The ENTRYPOINT option specifies the concrete default application that is used every time the image is used to build a container.

Question 2

Which Dockerfile command provides a mount point within the Container that connects it to the Docker Host's file systems?

Accepted Answer

VOLUME

Answer

Explanation:
VOLUME — Creates a mount point within the Container that connects it to the Docker Host's file systems. The contents of the chosen point in the image are filled into new volumes. It's also important to note that specifying Volumes in a Dockerfile can cause problems.

Question 3

Is this a UCP function?

Solution: analyzes photos to look for any security flaws.

Accepted Answer

No

Answer

Explanation:
Docker Universal Control Plane (UCP) is an enterprise on-premise solution that allows IT operations teams to deploy and maintain Dockerized apps in production while also providing developers with the agility and portability they require, all while staying inside the business firewall.

Question 4

Which of the following instructions is most commonly used to specify default arguments for an ENTRYPOINT command?

Accepted Answer

CMD

Answer

Explanation:
CMD specifies the container's default commands and/or parameters. If you require a default command that users can simply override, CMD is the best command to employ.

Question 5

Which of the following commands can be used to tell Docker that certain ports are used by containers?

Accepted Answer

EXPOSE

Answer

Explanation:
Docker EXPOSE is a Dockerfile directive or instruction that tells Docker that while executing a container, the image built by this Dockerfile will listen on this port. It does not expose the indicated port; rather, it is a type of documentation that informs the person in charge of the container about the port that must be exposed or published in order for outside communication to reach the container.

Docker Practice Test

Docker Practice Test

Docker Test 2