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Difficulty in Writing Docker Certified Associate Exam
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How to Prepare For Docker Certified Associate Exam
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.
Who should take the Docker Certified Associate Exam
The DCA Exam certification is an internationally-recognized certification that helps to have validation for those professionals who are knowledgeable in the Docker containerization technology. Candidates should have 6-12 months of experience and knowledge of using Docker services and docker images. It is good for these candidates:
- IT Administrator
- Linux Administrator
- Fresher
- Developers
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For more info read reference:
Docker blog Docker Use Case Docker Newsrooms Docker Exam Preparation Guide Docker Docs Docker forums
Reference: https://dockerlabs.collabnix.com/docker/dca.html
Docker DCA Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Networking | 15% | - Troubleshoot container and engine logs to understand a connectivity issue between containers - Publish a port so that an application is accessible externally - Configure Docker to use external DNS - Describe how to install a remote driver to a specific infrastructure provider - Describe the differences between "host" and "ingress" port publishing mode - Create a Docker bridge network for a developer to use for their containers - Describe the different types and use cases for the built-in network drivers - Identify which IP and port a container is externally accessible on - Understand the Container Network Model and how it interfaces with the Docker engine and network and IPAM drivers |
| Topic 2: Security | 15% | - Enable Docker Content Trust - Describe the difference between UCP and DTR - Describe MTLS and identity roles - Compare the UCP workers and managers - Describe the security architecture and responsibilities of the Docker EE platform - Describe MTLS - Describe the process to sign a Docker image - Describe UCP and DTR integration with LDAP/AD - Configure RBAC with UCP - Describe identity roles - Describe swarm default security - Describe default engine security |
| Topic 3: Storage and Volumes | 10% | - Describe the different graph driver storage backends - Identify the steps to take to clean up unused images on a filesystem and DTR - 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 use of tmpfs for ephemeral storage |
| Topic 4: Image Creation, Management, and Registry | 20% | - Describe how image layers work - Apply a file to create a new image - Utilize a registry to store an image - Describe how to set up and use a local registry - Inspect images and report specific attributes using filter and format - Describe the use of Dockerfile - Demonstrate tagging an image - Describe how an image registry works - Give examples on how to create an efficient image via a Dockerfile - Describe options, such as add, copy, volumes, expose, entry point - Identify and display the main parts of a Dockerfile - Use CLI commands such as list, delete, prune, rmi, etc. to manage images - Display layers of a Docker image |
| Topic 5: Installation and Configuration | 15% | - Outline the sizing requirements prior to installation - Describe the interaction between Docker and Linux - Use the install command to install DTR (Docker Trusted Registry) - Setup swarm, configure managers, add nodes, and setup the backup schedule - Describe the use of UCP (Universal Control Plane) - Configure logging drivers (splunk, journald, etc.) - Create and manager user and teams - Describe namespaces, cgroups, and configuration of certificates - Interpret errors to troubleshoot installation issues without assistance - Complete setup of repo, select a storage driver, and complete installation of Docker engine on multiple platforms - Demonstrate the ability to upgrade the Docker engine |
| Topic 6: Orchestration | 25% | - Add networks, publish ports - State the differences between running a container vs running a service - Complete the setup of a swarm mode cluster - Convert an application deployment into a stack file using a YAML compose file with "docker stack deploy" - Demonstrate steps to lock a swarm cluster - Extend the instructions to run individual containers into running services under swarm - Describe how a Dockerized application communicates with legacy systems - Describe and demonstrate how to use replication mode - Mount volumes - Describe the difference between global and replicated services - Increase number of replicas - Describe how to provide configuration to Kubernetes pods using configMaps and secrets - Manipulate a running stack of services - Describe how to deploy containerized workloads as Kubernetes pods and deployments - Identify the steps needed to troubleshoot a service not deploying - Interpret the output of "docker inspect" commands |
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