Question

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

A) To specify the port that a container should listen on

B) To specify the base image for the Dockerfile

C) To specify the user that should run the container

D) To specify the working directory for the container

Answer 1

Solution:A

Explanation: The EXPOSE instruction in a Dockerfile is used to specify the port that a container should listen on. It does not actually publish the port, but instead informs Docker that the container will listen on that port when it is running.