Administering Windows Server Hybrid Core Infrastructure (AZ-800) Practice

What file can be used to automate container image creation?

1. Docker compose file

2. A dockerfile

3. Docker image configuration

4. Docker Hub

The correct answer is: A dockerfile

The correct answer is a Dockerfile. A Dockerfile is a text document that contains all the commands needed to assemble an image, including specifications for the environment, dependencies, and configuration files required to run an application inside a container. By using a Dockerfile, users can automate the process of creating container images, resulting in reproducible builds and consistent application deployments. This automation is essential for continuous integration and deployment workflows as it allows for modifications to be easily managed and version-controlled. When changes are made to the application or its dependencies, the Dockerfile can be updated, and the image can be rebuilt without manual interventions. Unlike other options, the Docker Compose file is used to define and run multi-container applications but does not create container images itself. Docker image configuration refers to the metadata and settings applied to the image but does not serve the purpose of automating image creation. Docker Hub is a cloud-based registry for sharing and managing Docker images but is not a file used for image creation.