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Introduction to Docker Certified Associate Exam
Docker Certified Associate (DCA) certification serves as a foundational benchmark for real-world container technology expertise with Docker Enterprise Edition. Candidates for DCA Exam are seeking to prove fundamental Docker containerization technology knowledge and skills. Before taking this exam, exam aspirants ought to have a solid fundamental information of the concepts shared in the preparation guide as well as on containerization.
It is suggested that professionals accustomed to the ideas and also the technologies represented here by taking relevant training courses. Candidates are expected to have a strong understanding of core docker services, docker images, docker container, and their cmdlets. After passing this exam, candidates get a certificate from Docker that helps them to demonstrate their proficiency in Docker containerization technology to their clients and employers.
The benefit of obtaining the Docker Certified Associate Exam Certification
This certification will be judging your skills and knowledge on your understanding of Docker containerization technology concepts & Understanding of how to operate on Docker.
DCA Exam provide proven knowledge to use the tools to complete the task efficiently and cost-effectively than the other non-certified professionals lack in doing so.
This accreditation is a portable proof of skills in containerization technology.
DCA Certifications provide opportunities to get a job easily in which they are interested in instead of wasting years and ending without getting any experience.
DCA credential delivers higher earning potential and increased promotion opportunities because it shows a good understanding of Docker containerization technology.
Reference: https://dockerlabs.collabnix.com/docker/dca.html
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Docker DCA Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Orchestration | 25% | - Interpret the output of "docker inspect" commands - Complete the setup of a swarm mode cluster - Extend the instructions to run individual containers into running services under swarm - Manipulate a running stack of services - Describe the difference between global and replicated services - Mount volumes - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - Describe how a Dockerized application communicates with legacy systems - Increase number of replicas - Describe how to deploy containerized workloads as Kubernetes pods and deployments - Describe and demonstrate how to use replication mode - State the differences between running a container vs running a service - Identify the steps needed to troubleshoot a service not deploying - Demonstrate steps to lock a swarm cluster - Add networks, publish ports - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" |
| Topic 2: Networking | 15% | - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers - Describe the differences between "host" and "ingress" port publishing mode - Create a Docker bridge network for a developer to use for their containers - Publish a port so that an application is accessible externally - Troubleshoot container and engine logs to understand a connectivity issue between containers - Configure Docker to use external DNS - Describe how to install a remote driver to a specific infrastructure provider - Identify which IP and port a container is externally accessible on - Describe the different types and use cases for the built-in network drivers |
| Topic 3: Storage and Volumes | 10% | - Describe the different graph driver storage backends - Describe the storage models available for DTR (NFS, local) - Describe how volumes work with containers - Describe how to use a volume plugin (local vs. NFS) - Describe the use of tmpfs for ephemeral storage - Identify the steps to take to clean up unused images on a filesystem and DTR |
| Topic 4: Image Creation, Management, and Registry | 20% | - Describe how image layers work - Display layers of a Docker image - Inspect images and report specific attributes using filter and format - Identify and display the main parts of a Dockerfile - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Describe how to set up and use a local registry - Utilize a registry to store an image - Describe the use of Dockerfile - Apply a file to create a new image - Describe options, such as add, copy, volumes, expose, entry point - Describe how an image registry works - Demonstrate tagging an image - Give examples on how to create an efficient image via a Dockerfile |
| Topic 5: Installation and Configuration | 15% | - Describe namespaces, cgroups, and configuration of certificates - Setup swarm, configure managers, add nodes, and setup the backup schedule - Interpret errors to troubleshoot installation issues without assistance - Outline the sizing requirements prior to installation - Describe the use of UCP (Universal Control Plane) - Use the install command to install DTR (Docker Trusted Registry) - Demonstrate the ability to upgrade the Docker engine - Describe the interaction between Docker and Linux - Configure logging drivers (splunk, journald, etc.) - Create and manager user and teams - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms |
| Topic 6: Security | 15% | - Compare the UCP workers and managers - Describe MTLS - Enable Docker Content Trust - Describe the process to sign a Docker image - Describe default engine security - Describe identity roles - Describe the difference between UCP and DTR - Describe swarm default security - Describe the security architecture and responsibilities of the Docker EE platform - Describe UCP and DTR integration with LDAP/AD - Configure RBAC with UCP - Describe MTLS and identity roles |
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