最新なLinux Foundation KCNA問題集（203題）、真実試験の問題を全部にカバー！

質問 1：
You are running a containerized application on Kubernetes. You want to monitor the performance and health of your application and its containers effectively. Which of these open standards would you leverage?
A. open Policy Agent (OPA)
B. Kubernetes Resource Quotas
C. Service Mesh
D. Kubernetes Ingress
E. OpenTelemetry
正解：E
解説: (Pass4Test メンバーにのみ表示されます)

質問 2：
You are running a distributed database service in Kubernetes. The database requires secure communication between its pods and external clients. What Kubernetes networking features can you leverage to achieve this?
A. Configure NetworkPolicies to allow only encrypted traffic from external clients.
B. Use a Service of type 'LoadBalancer' with TLS termination.
C. Implement a custom network plugin that enforces encryption for all communication.
D. Enable mutual TLS authentication between database pods and clients.
E. Use a combination of Services, Ingress, and TLS termination to secure external access.
正解：B,D,E
解説: (Pass4Test メンバーにのみ表示されます)

質問 3：
You have a Kubernetes deployment that runs an application with multiple replicas. When a Pod fails, you need to ensure that the deployment automatically creates a replacement Pod. Which Kubernetes API resource is responsible for this functionality?
A. StatefulSet
B. ReplicaSet
C. Deployment
D. pod
E. Service
正解：B
解説: (Pass4Test メンバーにのみ表示されます)

質問 4：
What is the purpose of the 'nodeSelector" field in a Pod's YAML definition?
A. To specify the exact number of replicas for the pod.
B. To define the pod's image pull policy (Always, IfNotPresent, Never).
C. To specify the pod's termination grace period.
D. To restrict the pod's scheduling to nodes with specific labels.
E. To define the pod's restart policy (Always, OnFailure, Never).
正解：D
解説: (Pass4Test メンバーにのみ表示されます)

質問 5：
You are building a cloud-native application that uses a combination of Kubernetes, Istio, and Prometheus. You want to ensure that your application's logs, metrics, and traces are correlated for easy troubleshooting. What approach would you take to achieve this correlation?
A. Use a custom logging agent to collect logs and forward them to Prometheus.
B. Use the •kubectl logs* command to retrieve logs from individual pods and manually correlate them with metrics and traces.
C. Configure Istio to capture logs from pods and forward them to Prometheus.
D. Integrate Jaeger with Istio and Prometheus using the Istio Mixer to enrich tracing data with metrics and log information.
E. Use a centralized logging system like Fluentd to collect logs from Kubernetes and forward them to Prometheus.
正解：D
解説: (Pass4Test メンバーにのみ表示されます)

質問 6：
You are setting up a CI/CD pipeline for deploying a microservices application to Kubernetes. You want to ensure that only specific developers can trigger deployments to production. Which of the following security best practices should be implemented?
A. Store the Kubernetes configuration files (Deployment, Service) in a private repository and limit access to authorized developers.
B. IJse a dedicated CI/CD server for production deployments and restrict access to the server.
C. Use role-based access control (RBAC) to restrict access to sensitive deployments based on user roles.
D. Implement multi-factor authentication for accessing the CIICD pipeline.
E. Configure a Kubernetes admission controller to enforce specific deployment policies.
正解：B,C,D,E
解説: (Pass4Test メンバーにのみ表示されます)

質問 7：
You are implementing a continuous integration and continuous deployment (CI/CD) pipeline for a cloud native application running in Kubernetes. Which of the following tools can be used for building, testing, and deploying the application to the cluster?
A. GitHub Actions
B. Travis Cl
C. CircleCl
D. Jenkins
E. GitLab CI/CD
正解：A,B,C,D,E
解説: (Pass4Test メンバーにのみ表示されます)

質問 8：
You have a Kubernetes deployment running on a cluster that includes multiple nodes. You need to ensure that Pods from this deployment are scheduled only on nodes with a specific label 'gpu=true'. How can you achieve this?
A. By using a daemonset to run the deployment only on nodes with the 'gpu=true' label.
B. By applying a NodeAffinity to the deployments pod template.
C. By creating a custom resource definition that defines the GPU constraint and applying it to the deployment.
D. By using a ReplicaSet to control the deployments replicas on nodes with the 'gpu=true' label.
E. By using a PodDisruptionBudget to ensure that only nodes with the 'gpu=true' label are considered for scheduling.
正解：B
解説: (Pass4Test メンバーにのみ表示されます)

質問 9：
You need to configure a Kubernetes cluster to use a specific DNS server. Which of the following methods can be used to achieve this?
A. Setting the 'dnsPolicy' field in the Pod spec to 'ClusterFirst'
B. Using the kubelet command-line argument -cluster-dns
C. Configuring a custom DNS service in the cluster using a Deployment and a Service
D. Modifying the /etc/resolv.conf file on each node
E. Setting the 'dnsConfig' field in the Pod spec with custom DNS server details
正解：B,E
解説: (Pass4Test メンバーにのみ表示されます)