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Linux Foundation KCNA Technical Training | KCNA Latest Exam Tips

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q74-Q79):

NEW QUESTION # 74
You have a Kubernetes cluster with a custom network plugin that provides advanced networking capabilities. What needs to be considered when configuring this custom network plugin?

A. Deploy the plugin as a DaemonSet on each Kubernetes node.
B. Integrate the plugin with the Kubernetes API server to manage network resources.
C. Ensure that the custom plugin adheres to the Kubernetes CNI (Container Network Interface) specification.
D. Test the plugin thoroughly with your applications to ensure compatibility and performance.
E. Configure the plugin to support Kubernetes service discovery and load balancing.

Answer: A,B,C,D,E

Explanation:
All of the options are important considerations when configuring a custom network plugin in Kubernetes- - A Adherence to the CNI specification ensures interoperability with Kubernetes and other CNI plugins- - B: Support for service discovery and load balancing is crucial for seamless integration with Kubernetes services. - C: Integration with the Kubernetes API server allows the plugin to be managed and controlled by Kubernetes- - D Deploying the plugin as a DaemonSet ensures its availability and consistent behavior across all nodes. - E Thorough testing is essential to guarantee compatibility with your applications and the desired performance characteristics.

NEW QUESTION # 75
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 ConfigMaps to define the environment variables for Java and libraries.
B. Include the necessary Java version and libraries in the Dockerfile for the application image.
C. Pre-install the Java version and libraries on the Kubernetes nodes.
D. Use Kubernetes Init Containers to install the required dependencies before starting the main container.
E. Use Kubernetes Secrets to store the Java version and library information securely.

Answer: B,D

Explanation:
The most common approaches are to include the required Java and libraries within the Dockerfile to create a self-contained image, or to use Kubernetes Init Containers. Init containers run before the main application container, installing the dependencies, ensuring the proper runtime environment is available.

NEW QUESTION # 76
How can you achieve cost optimization in the cloud environment?

A. Use Spot Instances
B. Use Bare Metal
C. Use On Demand instances
D. Use Reserved Instances

Answer: D

NEW QUESTION # 77
Which of the following Kubernetes components is responsible for authenticating and authorizing users who access the Kubernetes API?

A. kube-proxy
B. kubelet
C. kubectl
D. apiserver
E. etcd

Answer: D

Explanation:
The Kubernetes API server (apiserver) is responsible for authenticating and authorizing users who access the Kubernetes API. It enforces access control rules based on RBAC (Role-Based Access Control) configurations. The apiserver acts as the central control point for all Kubernetes interactions, ensuring secure and controlled access to cluster resources.

NEW QUESTION # 78
Your organization is migrating a legacy web application to a serverless architecture on Azure. You want to ensure that the application's state is persisted during and after migration. Which Azure service would be most suitable for storing and managing the application's state?

A. Azure SQL Database
B. Azure Storage Account
C. Azure Event Hubs
D. Azure Cosmos DB
E. Azure Service Bus

Answer: A,D

Explanation:
Azure Cosmos DB and Azure SQL Database are the most suitable services for storing and managing application state during and after migration to a serverless architecture on Azure- Both offer persistent storage and support various data models. Cosmos DB is a fully managed, globally distributed, multi-model database service, while Azure SQL Database is a relational database service- Storage Accounts (B) are primarily for blob storage and may not be the best fit for managing application state. Service Bus (C) is for message queuing, and Event Hubs (D) are for real-time event ingestion- While these services might play a role in the serverless architecture, they are not the primary choice for persisting application state-

NEW QUESTION # 79
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