KCNA試験無料問題集（203題）「Linux Foundation Kubernetes and Cloud Native Associate 認定」

出題：1

Consider the following Dockerfile:
FROM ubuntu: latest
COPY . /
RUN apt-get update && apt-get install -y nginx
CMD ["nginx", "g", "daemon off; ' ' ]
What is the primary function of the "COPY" instruction in this Dockerfile?

A. Copies all files from the current directory to the container's root directory.

B. Copies only the Dockerfile to the container's /etc/nginx directory.

C. Copies all files from the current directory to the container's /etc/nginx directory.

D. Copies the entire Dockerfile to the container's filesystem.

E. Copies the Dockerfile to the container's Ivar/lib/docker directory.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：2

You have configured Prometheus to scrape metrics from a Kubernetes cluster, but you notice that some pods are not being scraped. You suspect that the Prometheus server might be experiencing resource constraints. How can you troubleshoot this issue?

A. Examine the Prometheus server's CPU and memory usage to identify any resource bottlenecks.

B. Check the Prometheus logs for any errors related to scraping or resource limitations.

C. Use the Prometheus •status/targets• endpoint to see which targets are currently being scraped and any errors encountered.

D. All of the above

E. Verify the Prometheus server's configuration and ensure that the scraping interval and target labels are correct.

正解：A,B,C,D,E 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：3

Explain the difference between a Docker image and a Docker container. Provide practical scenarios where they are used.

A. Docker images are used for storing data, while containers are used for running applications.

B. Docker images are used for running applications, while containers are used for storing data.

C. Docker images and containers are the same thing, just different names.

D. A Docker image is a blueprint for creating a container, while a container is a running instance of that image.

E. A Docker container is a blueprint for creating an image, while an image is a running instance of that container.

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：4

Consider the following Kubernetes YAML file representing a deployment:

What is the primary benefit of using a GitOps approach to manage this deployment compared to traditional methods?

A. GitOps enables easy rollbacks to previous deployments by leveraging the versioning capabilities of Git.

B. GitOps enhances security by preventing unauthorized changes to the Kubernetes cluster.

C. GitOps simplifies the process of managing complex Kubernetes deployments by providing a centralized repository for configuration.

D. GitOps automates the deployment process, eliminating the need for human intervention.

E. GitOps provides faster deployment times by eliminating the need for manual interventions.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：5

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. Use a Service of type 'LoadBalancer' with TLS termination.

B. Implement a custom network plugin that enforces encryption for all communication.

C. Configure NetworkPolicies to allow only encrypted traffic from external clients.

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：A,D,E 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：6

You are deploying a new microservice on Kubernetes. The microservice needs access to a shared configuration file stored in a ConfigMap. How would you access the configuration file from within your microservice container?

A. Define an environment variable within the pod spec and map it to the ConfigMap data.

B. Mount the ConfigMap as a volume into the container.

C. Access the ConfigMap data directly using the Kubernetes API.

D. Use a Kubernetes Secret to store the configuration file securely.

E. Use the *kubectl get' command to retrieve the configuration file from the ConfigMap.

正解：A,B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：7

You have a Kubernetes cluster running on AWS. You need to ensure that only approved container images are used in your cluster. Which Kubernetes feature can you use to enforce this policy?

A. Admission Controllers

B. Resource Quotas

C. Service Accounts

D. Pod Security Policies

E. Network Policies

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：8

Which of the following best describes the concept of 'cold starts' in serverless computing?

A. The time taken for a serverless function to access and process data from a database.

B. The latency introduced by network communication between a serverless function and its dependencies.

C. The overhead associated with invoking a serverless function from an external client.

D. The time it takes for a serverless function to be initialized and ready to execute after a period of inactivity.

E. The time required for a serverless function to scale up to handle increased workload.

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

You are working on a Kubernetes deployment for a microservices-based application. You need to enforce consistent configuration across different environments (development, staging, production). Which of the following approaches is most appropriate?

A. Hardcoding configuration values within the application code

B. Manually configuring each pod with environment-specific values

C. Deploying the application using Docker Compose

D. Using a third-party configuration management tool like Chef or Puppet

E. Using Kubernetes ConfigMaps to store and manage configuration data

正解：E 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：10

You are building a CI/CD pipeline to deploy a Java application to Kubernetes. The application requires a specific Java version and some libraries to run correctly. How would you ensure that the correct runtime environment is available in the Kubernetes cluster?

A. Use Kubernetes Init Containers to install the required dependencies before starting the main container.

B. Pre-install the Java version and libraries on the Kubernetes nodes.

C. Include the necessary Java version and libraries in the Dockerfile for the application image.

D. Use Kubernetes Secrets to store the Java version and library information securely.

E. Use Kubernetes ConfigMaps to define the environment variables for Java and libraries.

正解：A,C 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

KCNA試験無料問題集「Linux Foundation Kubernetes and Cloud Native Associate 認定」