The correct answer is: A. “batteries included but removable”.
Docker is a software platform that allows you to package and run applications in containers. Containers are isolated from each other and from the host operating system, which makes them a good way to deploy applications in a consistent and reliable way.
Docker’s basic approach is to provide a “batteries included” experience. This means that Docker provides everything you need to run an application, including the operating system, libraries, and other dependencies. However, Docker also makes it easy to remove these dependencies if you need to. This is done by using a feature called “layers”.
Layers are a way of organizing the files that make up a container. Each layer contains a set of files that are needed to run the application. When you create a new container, Docker starts with a base image and then adds the layers that are needed for your application. This means that you can easily remove layers if you don’t need them.
For example, if you have an application that needs the Java runtime, Docker will create a layer that contains the Java runtime. If you then decide that you don’t need the Java runtime, you can remove that layer and the application will still run.
This approach of providing “batteries included but removable” is one of the things that makes Docker so popular. It makes it easy to get started with Docker and to deploy applications in a consistent and reliable way.
The other options are incorrect because they do not accurately reflect Docker’s basic approach. Option B, “batteries included but non-removable”, is incorrect because it implies that you cannot remove the dependencies that Docker provides. Option C, “batteries but chargeable”, is incorrect because it implies that you need to charge the batteries that Docker provides. Option D, “battery less execution”, is incorrect because it implies that Docker does not provide any batteries.