The video tutorial introduces key Docker terminologies, explaining containers as instances of Docker images, their execution environment, and the concept of immutability. It covers the process of building container images using Docker files, and the push and pull operations for container registries. The tutorial concludes with a transition to Azure Kubernetes services, setting the stage for further learning on Kubernetes features and architecture.

What is a container in the context of Docker?

• A type of cloud service

• An instance of a Docker image

• A virtual machine

• A physical server

What does it mean when a container image is described as immutable?

• It is stored in a mutable format

• It can be modified after creation

• It can be updated automatically

• It cannot be changed once created

What is the purpose of the Docker build command?

• To execute a container

• To update a Docker file

• To delete a container

• To build a container image

What is the process of downloading a container image from a registry called?

• Clone

• Push

• Fetch

• Pull

What is the first line in a Docker file typically used for?

• To specify the base image

• To define environment variables

• To set the working directory

• To run a command