3 Questions
What is the command used to create a container from a specified image?
docker run
What is the bottom layer of a Docker image?
The base image
What is required to run a containerized application?
Code
Study Notes
- A Docker image contains everything required to run a containerized application - this includes code, config files, environment variables, libraries, and runtimes.
- A Docker image can be created in two ways - through an interactive method or by using a Dockerfile.
- The docker run command will create a container from a specified image.
- A Docker image is built by layers that are added on top of each other. The bottom layer is the base image, and each successive layer is dependent on the one below it.
- The container layer is a thin writable layer that docker adds each time a container is launched from an image.
- The parent image is the first layer of a Docker image and provides the basic blocks for your container environments.
- A base image is an empty first layer that allows you to build your Docker images from scratch.
Test your knowledge about Docker images and containers with this quiz. Learn about the creation, layers, and usage of Docker images and containers.
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