Docker

Where a dockerized application should persist data?

Introduction of options Docker provides to store and access data.

What is Docker Registry? What is Docker Hub?

Explains the repository called Docker Registry that keeps Docker Images as blob file. Docker Hub is such a publicly accessible repository.

What are Docker images ? How Docker Images are created? How Docker Images are used?

Docker Image is a binary file with minimal runtime of an OS, libraries & dependent packages to run application with the app. executables

What are Docker containers? Why should I use docker containers?

Explains the concept of a container and its usefulness in Docker

How do multiple applications running their own container communicate in development space?

Applications running in seperate docker containers can communicate using network of the host machine