The Docker Certified Associate exam (DCA) validates these skills through real-world questions that are created by Docker practitioners. As the first exam in a multi-tiered professional certification program, the DCA serves as a benchmark for real-world Docker skills. Let’s now examine the details and preparation guide for the Docker Certified Associate Exam.
Prerequisites for Docker Certified Associate Exam
The knowledge and skills required for this level should include all of the objective components:
Start with 6 months Docker experience.
Second, familiarity and Docker Enterprise Edition.
Experience with container security is a must.
Finally, you should have used at least one cloud provider.
It is also important to understand Docker Best Practices.
Additionally, you will need to be familiar with configuration management tools.
Finally, knowledge of Linux or Windows Server is essential.
Let’s now get to the point.
How do you prepare for the Docker Certified Associate Exam
Docker certification is achieved by passing the Docker Certified Associate exam (DCA) and earning a reputation for your Docker skills. The Docker container is an example of innovation that has changed the way software is shipped. Let’s take a look at each step of becoming a Docker Certified Associate.
Step 1: Get to know the exam syllabus in detail
Below is the Docker-provided course outline and whitepapers.
Domain 1: Orchestration (25% exam)
Completion of the setup of a cluster in swarm mode with workers and managers. (Documentation:Create a swarm)
Describe and demonstrate how you can extend the instructions for running individual containers into running services as part of the swarm. (Documentation:Deploy service to the swarm)
Describe the importance quorum in a cluster of swarms.
Describe the differences between running a service and a container.
Interpret the output of “docker inspections” commands. (Documentation:Inspect a service on the swarm)
Convert an application deployment into a stack file using a YAML compose file with “docker stack deploy” (Documentation:docker stack deploy)
Manage a running stack. (Documentation:Related commands)
Describe and demonstrate orchestration activities.
Increase the number replicas. (Documentation:docker service scale)
Add networks, publish ports. (Documentation:Networking overview)
Mount volumes. (Documentation:Use volumes)
Also, describe and demonstrate how to operate global and replicated services. (Documentation:Replicated and global services)
Further, you can use Apply node labels for demonstrating the placement of tasks. (Documentation:docker node update)
Also, describe and demonstrate how to use templates using “docker Service Create”. (Documentation:Create services using templates)
Also, identify the steps required to troubleshoot an undeploying service. (Documentation:Deploy a service to the swarm)
Further, describe how a Dockerized app communicates with legacy systems. (Documentation:Container networking)
Furthermore, describe how to deploy containerized workloads such as Kubernetes pods or deployments
Also, describe how to configure Kubernetes pods with config maps and secrets.
Domain 2: Image Creation and Management, and Registry (20% exam)
Describe Dockerfile.
Describe options such as add, copy volumes, expose, and entry point. (Documentation:FROM)
Identify and display the most important parts of a Dockerfile. (Documentation:Dockerfile)
Describe and demonstrate how to create a Dockerfile that produces an efficient image. (Documentation – Best practices for writing Dockerfiles
Demonstrate and describe how to use CLI commands for managing images such as list delete, prune, rmi, and prune. (Documentation:Usage)
Describe and demonstrate how to inspect images and report specific attributes using filter and format (Documentation:Extended description)
Describe and demonstrate how you can tag an image. (Documentation:docker tag)
Also, describe and demonstrate how to use a file to create Docker images.
Also, describe and demonstrate how layers of a Docker Image can be displayed
Furthermore, describe and demonstrate how to reduce an image to one layer.
Also, describe and demonstrate registry functions. (Documentation – Copy an image from Docker Hub and add it to your registry
Further, you can also Deploy a Registry. (Documentation:Deploy a registry server)
moreover, Log into a registry. (Documentation:Parent command)
Also, you can search in a registry.
Further, push an image to a registry
You can also sign an image into a registry.
Images can be pulled from a registry and deleted.
Domain 3: Installation & Configuration (15% exam)
Describe the requirements for installation.
Also, describe and demonstrate how to set up the repo, select a storage driver, install the Docker engine on multiple platforms.
Also, describe and demonstrate the configurations of logging drivers (Splunks, journals, etc.). (Documentation:Configure logging drivers)
Describe and demonstrate how you can set up a swarm, manage managers, add nodes and set up the backup schedule. (Documentation:Administer and maintain a swarm of Docker Engines)
Describe and demonstrate how you can manage users and teams.
Describe and demonstrate how you can configure Docker daemon for boot. (Documentation:Configure and troubleshoot the Docker daemon)
Demonstrate and describe how to use certificate-based client/server authentication to grant Docker daemon access to images in a registry. (Documentation:Verify repository client with certificates)
Also, see Describe the use namespaces, groups and certificate configuration.
Furthermore, you can also describe and interpret errors to troubleshoot installation problems without any assistance.
Define and demonstrate the steps required to deploy.