The Complete Practical Docker Guide - What is Docker Image

The video tutorial provides an overview of Docker images, explaining their structure as a set of files and folders organized into multiple file system layers. It highlights the benefits of this structure, such as reusability and efficiency. The tutorial also discusses base images, the read-only nature of Docker images, and how they can be stored in public or private repositories. It covers image management, including copying and moving images, and distinguishes between official and community images. The tutorial concludes with a transition to creating a container based on a Docker image.

What is the primary reason for splitting Docker images into multiple file system layers?

• To increase the size of the image

• To make images more complex

• To enable reusability of layers across different images

• To make images harder to understand

What is a base image in the context of Docker?

• An image that is always public

• An image that serves as a starting point for adding additional layers

• An image that cannot be modified

• An image that contains all possible layers

Which of the following statements is true about Docker images?

• Docker images can be modified directly

• Docker images are read-only

• Docker images do not have layers

• Docker images cannot be stored in repositories

Where can Docker images be stored?

• Only on local machines

• Only in public repositories

• In both public and private repositories

• Only in private repositories

What happens during the download process of a Docker image?

• The entire image is downloaded as a single file

• Archived layers are downloaded and extracted

• Only the base image is downloaded

• The image is downloaded without any layers

What is the difference between official and community Docker images?

• Community images cannot be used publicly

• Official images are free, while community images are paid

• Official images are created by Docker, while community images are created by users

• Community images are always better than official images

What is a key characteristic of every Docker image?

• It is always created by Docker

• It is always stored in a private repository

• It consists of multiple file system layers

• It can be modified directly