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| Certification Vendor: | Docker |
|---|---|
| Exam Name: | Docker Certified Associate (DCA) Exam |
| Exam Number: | DCA |
| Exam Price: | USD 195 (approx.) |
| Related Certifications: | Docker Certified Associate |
| Available Languages: | English |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 55-60 (approx.) |
| Certificate Validity Period: | 2 years |
| Exam Format: | Scenario-based questions, Multiple choice, Multiple select, Performance-based tasks |
| Recommended Training: | Docker Official Training Courses Get Started with Docker Documentation |
| Exam Registration: | Docker Training & Exams Portal Docker Certification Official Page |
| Sample Questions: | Docker DCA Sample Questions |
| Exam Way: | Online proctored exam (remote) or authorized testing center depending on region |
| Pre Condition: | No formal prerequisites required; recommended 6-12 months of Docker/container experience |
| Official Syllabus URL: | https://www.docker.com/certification/ |
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Docker is a popular platform used to build, run, and deploy applications in containers. It provides a way to package software applications and their dependencies into a standardized unit that can run consistently across different environments. The Docker Certified Associate (DCA) exam is a certification program that validates an individual’s knowledge and expertise in working with Docker. Docker Certified Associate (DCA) Exam certification is designed for IT professionals who want to demonstrate their proficiency in using Docker to develop and deploy applications.
NEW QUESTION # 175
Does this command display all the pods in the cluster that are labeled as 'env: development'?
Solution: 'kubectl get pods --all-namespaces -label env=development'
Answer: A
Explanation:
Explanation
= The command kubectl get pods --all-namespaces -label env=development is not valid because it has a syntax error. The correct syntax for listing pods with a specific label is kubectl get pods --all-namespaces
--selector label=value or kubectl get pods --all-namespaces -l label=value. The error in the command is:
* The option flag for specifying the label selector is --selector or -l, not -label. For example, -label env=development should be --selector env=development or -l env=development.
The correct command for listing all the pods in the cluster that are labeled as env: development is:
kubectl get pods --all-namespaces --selector env=development
This command will display the name, status, restarts, and age of the pods that have the label env:
development in all namespaces.
References: : Labels | Kube by Example : kubectl Cheat Sheet | Kubernetes
NEW QUESTION # 176
Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.
Is this a way to accomplish this?
Solution: Add all the resources to the default namespace.
Answer: A
Explanation:
Explanation
Adding all the resources to the default namespace is not a way to accomplish this, because it would not isolate the resources for each application. Instead, the teams should use namespaces, which are a mechanism to organize resources in a Kubernetes cluster. Namespaces provide a scope for names of resources and a way to attach authorization and policy to a subset of the cluster. By creating a separate namespace for each application, the teams can ensure that their resources are grouped together and not accessible by other teams or applications.
References:
* What is a Container? | Docker
* Docker Certified Associate Guide | KodeKloud
* DCA Prep Guide | GitHub
* Namespaces | Kubernetes
NEW QUESTION # 177
Is this a type of Linux kernel namespace that provides container isolation?
Solution: Authentication
Answer: A
Explanation:
= Authentication is not a type of Linux kernel namespace that provides container isolation. Namespaces are a feature of the Linux kernel that partitions kernel resources such that one set of processes sees one set of resources and another set of processes sees a different set of resources. Docker uses six different namespaces to isolate containersfrom the host and from each other: PID, USER, UTS, IPC, MNT, and NET12. Authentication is not one of them. Authentication is a process of verifying the identity of a user or a system, which is usually done by using credentials such as passwords, tokens, or certificates. Authentication does not directly affect the isolation of containers, although it can be used to control access to them. Reference:
Docker security | Docker Docs
Securing Docker Containers with Linux Kernel Features | Infosec
NEW QUESTION # 178
You want to create a container that is reachable from its host's network.
Does this action accomplish this?
Solution.Use network connect to access the container on the bridge network.
Answer: A
Explanation:
= Using network connect to access the container on the bridge network does not accomplish creating a container that is reachable from its host's network. The network connect command connects a container to an existing network, but it does not expose the container's ports to the host1. The bridge network is the default network that Docker creates for containers, and it provides isolation from the host network2. To create a container that is reachable from its host's network, you need to use the host network driver, which disables network isolation and uses the host's network stack directly3. Alternatively, you can use the port mapping feature to publish specific ports of the container to the host4. Reference:
docker network connect | Docker Docs
Bridge network driver | Docker Docs
Host network driver | Docker Docs
Publish ports on the host | Docker Docs
NEW QUESTION # 179
In the context of a swarm mode cluster, does this describe a node?
Solution.an instance of the Docker CLI connected to the swarm
Answer: A
Explanation:
Explanation
The statement does not describe a node in the context of a swarm mode cluster. A node is a physical or virtual machine running Docker Engine 1.12 or later in swarm mode1. An instance of the Docker CLI connected to the swarm is not a node, but a client that can interact with the swarm through the Docker API2. The Docker CLI can be used to create a swarm, join nodes to a swarm, deploy services to a swarm, and manage swarm behavior3. References: How nodes work), Docker CLI), Swarm mode overview)
NEW QUESTION # 180
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