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Preparation Guide for Docker Certified Associate Exam
Introduction
Docker is one of the open-source technology and very much demanding these days in IT, It had brought a revolution in the container technology, Docker has created a track for certification where an individual can appear and validate their skill set. This certification program will provide Docker Cloud Certified Associate a way to demonstrate their skills. The assessment is based on a rigorous exam using the industry-standard methodology to determine whether a candidate meets Docker's proficiency standards.
According to Docker, a DCA Certified Professional enables organizations will able to provision containers as and when they required using container images.
Certification is evidence of your skills, expertise in those areas in which you like to work. If the candidate wants to work on Docker Containerization technologies and prove his knowledge, certification is offered by Docker. This DCA Exam Certification helps a candidate to validates his skills in Docker Containerization technologies.
In this guide, we will cover the Docker Certified Associate Certification exam, Docker Certified Associate Certified professional salary and all aspects of the Docker Certified Associate Certification.
Reference: https://dockerlabs.collabnix.com/docker/dca.html
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Installation and Configuration | 15% | - Describe the interaction between Docker and Linux - Use the install command to install DTR (Docker Trusted Registry) - Outline the sizing requirements prior to installation - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms - Describe the use of UCP (Universal Control Plane) - Configure logging drivers (splunk, journald, etc.) - Describe namespaces, cgroups, and configuration of certificates - Demonstrate the ability to upgrade the Docker engine - Interpret errors to troubleshoot installation issues without assistance - Create and manager user and teams - Setup swarm, configure managers, add nodes, and setup the backup schedule |
| Topic 2: Networking | 15% | - Describe the differences between "host" and "ingress" port publishing mode - Troubleshoot container and engine logs to understand a connectivity issue between containers - Describe how to install a remote driver to a specific infrastructure provider - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers - Identify which IP and port a container is externally accessible on - Publish a port so that an application is accessible externally - Describe the different types and use cases for the built-in network drivers - Configure Docker to use external DNS - Create a Docker bridge network for a developer to use for their containers |
| Topic 3: Image Creation, Management, and Registry | 20% | - Describe the use of Dockerfile - Describe how to set up and use a local registry - Inspect images and report specific attributes using filter and format - Describe how an image registry works - Apply a file to create a new image - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Describe how image layers work - Utilize a registry to store an image - Display layers of a Docker image - Describe options, such as add, copy, volumes, expose, entry point - Demonstrate tagging an image - Identify and display the main parts of a Dockerfile - Give examples on how to create an efficient image via a Dockerfile |
| Topic 4: Storage and Volumes | 10% | - Describe the use of tmpfs for ephemeral storage - Describe how to use a volume plugin (local vs. NFS) - Describe how volumes work with containers - Describe the storage models available for DTR (NFS, local) - Describe the different graph driver storage backends - Identify the steps to take to clean up unused images on a filesystem and DTR |
| Topic 5: Security | 15% | - Describe MTLS and identity roles - Describe the security architecture and responsibilities of the Docker EE platform - Describe default engine security - Describe identity roles - Describe MTLS - Describe UCP and DTR integration with LDAP/AD - Configure RBAC with UCP - Enable Docker Content Trust - Describe swarm default security - Describe the difference between UCP and DTR - Describe the process to sign a Docker image - Compare the UCP workers and managers |
| Topic 6: Orchestration | 25% | - Describe the difference between global and replicated services - Increase number of replicas - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" - Demonstrate steps to lock a swarm cluster - Describe how to deploy containerized workloads as Kubernetes pods and deployments - Manipulate a running stack of services - Interpret the output of "docker inspect" commands - Describe how a Dockerized application communicates with legacy systems - Extend the instructions to run individual containers into running services under swarm - Complete the setup of a swarm mode cluster - Describe and demonstrate how to use replication mode - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - State the differences between running a container vs running a service - Add networks, publish ports - Identify the steps needed to troubleshoot a service not deploying - Mount volumes |
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