Containerized Application Development

Study points for the exam

To help you prepare, review the exam objectives, which highlight the task areas you can expect to see on the exam.

Candidates should have the following skills and abilities:

Implementing images

  • Understand and use FROM (the concept of a base image)
  • Understand and use RUN
  • Understand and use ADD
  • Understand and use COPY
  • Understand the difference between ADD & COPY
  • Understand and use WORKDIR and USER
  • Understand security-related topics
  • Understand the differences and applicability of CMD versus ENTRYPOINT
  • Understand ENTRYPOINT with param
  • Understand and use ONBUILD
  • Understand when and how to EXPOSE port from a Dockerfile
  • Understand and use environment variables inside images
  • Understand how ENV is used to allow multiple containers work together
  • Understand container VOLUME
  • Mount a host directory as a data volume
  • Understand security and permissions requirement related to this approach
  • Create and mount a data volume container
  • Understand lifecycle and "clean up" requirement of this approach
  • Managing images
  • Understand private registry security
  • Interact with many different registries
  • Understand and use image tags
  • Push and pull images from/to registries
  • Backup an image with its layers and meta datas versus backup a container state
  • Running containers locally
  • Link containers
  • Connect with the linking system
  • Understand and apply environment variables naming requirement while using the linking system
  • Get container logs
  • Listen to Docker events on the Docker host
  • Use Docker inspect
  • Share data between containers
  • Use a mounted host directory as a data volume
  • Use and mount a data volume container
  • Understand host and container basic security best practices