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Docker Certified Associate (DCA) exam is an industry-recognized certification that validates an individual’s knowledge and skills in managing and deploying Docker containers. DCA exam covers a wide range of topics related to Docker and its related technologies, including container networking, image creation and management, container orchestration, and security. Docker Certified Associate (DCA) Exam certification is highly valued in the industry and can lead to higher salaries and promotions. Candidates can prepare for the exam by taking advantage of Docker’s training courses and resources or by using third-party study materials.
To take the DCA exam, candidates must have a good understanding of Docker technologies, including Docker Engine, Docker Compose, Docker Swarm, and Docker Content Trust. They should also be familiar with containerization and associated technologies like Kubernetes, as well as container orchestration and management. DCA Exam consists of 55 multiple-choice questions and lasts for 90 minutes.
Docker Certified Associate (DCA) Certification Exam is a professional certification that validates a candidate’s knowledge and proficiency in using Docker Enterprise Edition (EE) and Docker Community Edition (CE) in a real-world environment. DCA exam is designed to test the candidate’s ability to perform tasks related to Docker, such as deploying and managing Docker containers, working with images, networking, and security.
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Docker Certified Associate (DCA) Exam Sample Questions (Q181-Q186):
NEW QUESTION # 181
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add the user directly to the list of users with read/write access under the repository's Permissions tab.
Answer: B
NEW QUESTION # 182
The Kubernetes yaml shown below describes a clusterIP service.
Is this a correct statement about how this service routes requests?
Solution: Traffic sent to the IP of any pod with the label app: nginx on port 8080 will be forwarded to port 80 in that pod.
Answer: B
Explanation:
The statement is incorrect because it does not mention the service name or the clusterIP address. Traffic sent to the IP of any pod with the label app: nginx on port 8080 will not be forwarded to port 80 in that pod, unless the traffic is coming from another pod within the same cluster that knows the pod IP. To access the service from outside the cluster, the traffic must be sent to the clusterIP address of the service, which is assigned by Kubernetes, and the port 8080 of the service, which is defined in the yaml file. The service will then forward the traffic to one of the selected pods on port 80.
To summarize, the correct statement should be:
Traffic sent to the clusterIP address of the service dca on port 8080 will be forwarded to port 80 in one of the pods with the label app: nginx.
NEW QUESTION # 183
Is this statement correct?
Solution: A Dockerfile provides instructions for building a Docker image
Answer: B
Explanation:
A Dockerfile is a text file that contains all the commands a user could run on the command line to create an image1. A Dockerfile is composed of instructions that specify the parent image, the packages to install, the files to copy, the ports to expose, and the commands to run2. A Dockerfile can be used to build a Docker image with the docker build command3. Reference:
Dockerfile reference | Docker Docs
What is a Dockerfile? A Step-by-Step Guide [2023 Updated] - Simplilearn How to Build Docker Images with Dockerfile | Linuxize
NEW QUESTION # 184
You are pulling images from a Docker Trusted Registry installation configured to use self-signed certificates, and this error appears:
'x509: certificate signed by unknown authority'.
You already downloaded the Docker Trusted Registry certificate authority certificate from https://dtr.example.com/ca.
How do you trust it? (Select two.)
Answer: D,E
NEW QUESTION # 185
In Docker Trusted Registry, is this how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository?
Solution: Tag the image with 'nginx:immutable'.
Answer: B
Explanation:
Explanation
Tagging the image with 'nginx:immutable' is not how a user can prevent an image, such as 'nginx:latest', from being overwritten by another user with push access to the repository. Tagging the image with
'nginx:immutable' will only create a new tag for the image, but it will not prevent the original tag from being overwritten. To prevent an image tag from being overwritten in Docker Trusted Registry, the user can use the DTR web UI to make the tag immutable1. This will prevent anyone from pushing a new image with the same tag, even if they have push access to the repository1. Alternatively, the user can also use the DTR API to make the tag immutable2. References: Prevent tags from being overwritten), DTR API reference)
NEW QUESTION # 186
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