Chapter 2

1. b: The image ID is the only identification of uniqueness when listing or managing images. We can have one ID with many names, including the registry part, and tags.
2. d: All the methods described are valid.

3. b: Using a Dockerfile is a reproducible method as we describe all actions to add software, execute commands, add files, and more, in order to build a new image. We can automate and use templates to build images with Dockerfiles and this is the preferred method.
4. a and c: Only RUN, CMD, and ENTRYPOINT instructions admit shell and exec formats.
5. a: Using the shell format, the container main process, as defined by the ENTRYPOINT key, cannot be modified with arguments.