최신 KCNA 무료덤프 - Linux Foundation Kubernetes and Cloud Native Associate

문제1

You have a Kubernetes cluster with a deployment of a stateless application. Explain how you would ensure high availability for the application even if a node fails. What are some essential configurations to implement for this purpose?

A. Configure the deployment with a high number of replicas and use a load balancer to distribute traffic.

B. Configure the deployment with a low number of replicas and use a service to expose the application.

C. Use a custom resource definition (CRD) to manage the high availability of the application.

D. Enable persistent volumes to store application data on a separate storage system.

E. Configure a pod disruption budget (PDB) to prevent a large number of pods from being deleted simultaneously.

정답: A,E

설명: (DumpTOP 회원만 볼 수 있음)

문제2

You are deploying a web application that requires a specific version of Node.js. How would you ensure that the correct Node.js version is installed on all nodes in your Kubernetes cluster?

A. Use a Dockerfile to include the specific Node.js version in the container image for the web application.

B. Install Node.js manually on each node before deploying the application.

C. Define a custom Kubernetes resource to manage Node.js installation across the cluster.

D. Use a Helm chart to manage the installation of Node.js on all nodes in the cluster.

E. Use a Kubernetes init container to install Node.js before the main application container starts.

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제3

Your application requires a specific storage class for its persistent dat
a. How do you configure this storage class within your deployment YAML?

A. Create a separate PersistentVolumeClaim (PVC) with the desired storage class and reference the PVC in the deployment's name' field.

B. Specify the storage class name directly within the 'spec.template.spec.containers[0].volumeMounts[0].name' field of the deployment.

C. Specify the storage class name within the 'spec.template.spec.containers[01.volumeMounts[0].storageClassName' field of the deployment.

D. None of the above

E. Specify the storage class name within the field of the deployment.

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제4

You are tasked with deploying a microservices application on Kubernetes. The application relies heavily on communication between its different services, and you need to ensure reliable and secure communication. Which of the following open standards are most relevant for this scenario?

A. Open Container Initiative (OCI)

B. Cloud Native Computing Foundation (CNCF)

C. Open Service Mesh (OSM)

D. Kubernetes API

E. Service Level Objectives (SLOs)

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제5

You are using Kubernetes for deploying a microservices architecture. Each microservice has a unique configuration that needs to be injected into the container at runtime. Which approach is the most effective for managing these dynamic configuration changes?

A. Using a service mesh to manage configuration and traffic routing

B. Hardcoding configurations in the container image

C. Creating a separate ConfigMap for each service and mounting it as a volume

D. Using environment variables during pod creation

E. Implementing a custom configuration management system outside of Kubernetes

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제6

Which of the following Kubernetes components is responsible for authenticating and authorizing users who access the Kubernetes API?

A. etcd

B. apiserver

C. kubelet

D. kubectl

E. kube-proxy

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제7

You are troubleshooting a performance issue with an application running in a Kubernetes cluster. You have access to Prometheus and Jaeger, but the Jaeger Ul shows that a specific request took an unusually long time to process. Which metric in Prometheus can help you identify the specific component or service within the application that caused the delay?

A. kube_pod_container_status_restart_count

B. http_request_duration_seconds

C. kube_deployment_status_replicas

D. kube_pod_status_phase

E. kube_pod_container_resource_requests_cpu_cores

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제8

Explain the difference between a Deployment and a StatefulSet in Kubernetes.

A. Deployments are used for managing the lifecycle of a single Pod, while StatefulSets manage multiple Pods.

B. Deployments are used for stateless applications, while StatefulSets are used for stateful applications that require persistent storage and unique identities.

C. Deployments are used for deploying and managing stateless applications, while StatefulSets are used for deploying and managing stateful applications.

D. Deployments are responsible for scheduling Pods, while StatefulSets manage the lifecycle of Services.

E. Deployments handle rolling updates, while StatefulSets only support manual updates.

정답: B,C

설명: (DumpTOP 회원만 볼 수 있음)

문제9

You are running a Kubernetes cluster in a public cloud environment. Which of the following security best practices is MOST important for protecting your cluster against external threats?

A. Disabling Kubernetes RBAC and granting full access to all users.

B. Deploying all applications in the same namespace.

C. Deploying the Kubernetes control plane in a public subnet.

D. Using a network firewall to restrict access to the Kubernetes API server.

E. Running all containers with the '-privileged' flag enabled.

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제10

You're running a web application in Kubernetes that experiences occasional spikes in traffic. You want to scale your application horizontally to handle these spikes automatically. What Kubernetes resource should you utilize to achieve this?

A. Deployment

B. StatefulSet

C. Service

D. HorizontalPodAutoscaler (HPA)

E. DaemonSet

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

최신 KCNA 무료덤프 - Linux Foundation Kubernetes and Cloud Native Associate

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