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Docker Certified Associate (DCA) certification exam is a vendor-neutral certification offered by Docker, Inc. Docker Certified Associate (DCA) Exam certification is designed to validate the knowledge and skills of the candidates in Docker container technology. Docker Certified Associate (DCA) Exam certification exam is intended for IT professionals who work with Docker container technology and want to validate their knowledge and skills in this field. Docker Certified Associate (DCA) Exam certification is also suitable for professionals who want to learn Docker container technology and want to validate their knowledge and skills in this field.
Docker Certified Associate (DCA) Exam Sample Questions (Q112-Q117):
NEW QUESTION # 112
Is this a type of Linux kernel namespace that provides container isolation?
Solution. Process ID
Answer: B
Explanation:
Process ID is a type of Linux kernel namespace that provides container isolation. Linux namespaces are a feature of the Linux kernel that isolate and virtualize system resources of a collection of processes1. Process ID namespace isolates the process ID number space, meaning that processes in different PID namespaces can have the same PID2. This allows each container to have its own init process with PID 1, which is the ancestor of all other processes in the container3. Process ID namespace also affects other identifiers, such as thread IDs, parent process IDs, and session IDs4. References: Namespaces in operation), pid_namespaces), What is a PID namespace?, Linux Namespaces: PID)
NEW QUESTION # 113
Is this a function of UCP?
Solution: image role-based access control
Answer: B
NEW QUESTION # 114
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. Create a collection for for each application.
Answer: B
Explanation:
= Creating a collection for each application is not a way to accomplish this. A collection is a term used by Ansible to describe a package of related content that can be used to automate the management of Kubernetes resources1. A collection is not a native Kubernetes concept and does not group resources together within the cluster. To group Kubernetes-specific resources, such as secrets, for each application, you need to use namespaces. A namespace is a logical partition of the cluster that allows you to isolate resources and apply policies to them2. You can create a namespace for each application and store the secrets and other resources in that namespace. This way, you can prevent conflicts and limit access to the resources of each application. To create a namespace, you can use the kubectl create namespace command or a yaml file2. To create a secret within a namespace, you can use the kubectl create secret command with the --namespace option or a yaml file with the metadata.namespace field3. References:
* Kubernetes Collection for Ansible - GitHub
* Namespaces | Kubernetes
* Secrets | Kubernetes
* Managing Secrets using kubectl | Kubernetes
NEW QUESTION # 115
Will this command display a list of volumes for a specific container?
Solution. 'docker container inspect nginx'
Answer: B
Explanation:
Explanation
Using docker container inspect nginx does display a list of volumes for a specific container. The docker container inspect command shows low-level information about one or more containers in JSON format. This information includes various details about the container's configuration, state, network settings, mounts, etc.
To display a list of volumes for a specific container, you can either look at the Mounts section in the JSON output or use --format '{{ .Mounts }}' to filter out only that section. References:
https://docs.docker.com/engine/reference/commandline/container_inspect/,
https://docs.docker.com/engine/reference/commandline/container_inspect/#format-the-output
NEW QUESTION # 116
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker network create -d overlay -o encrypted=true <network-name>
Answer: B
Explanation:
The command docker network create -d overlay -o encrypted=true <network-name> will ensure that overlay traffic between service tasks is encrypted. This command creates an overlay network with the encryption option enabled, which means that Docker will create IPSEC tunnels between all the nodes where tasks are scheduled for services attached to the overlay network. These tunnels use the AES algorithm in GCM mode and manager nodes automatically rotate the keys every 12 hours1. This way, thedata exchanged between containers on different nodes on the overlay network is secured. Reference:
Overlay network driver
NEW QUESTION # 117
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