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The Linux Foundation KCNA exam is suitable for individuals who have a basic understanding of Linux and containers and want to deepen their knowledge of Kubernetes and cloud native technologies. It covers a range of topics, including Kubernetes architecture, deployment and maintenance, networking, security, and troubleshooting. KCNA Exam is conducted online and consists of multiple-choice questions that test the candidate's understanding of these concepts.

Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q73-Q78):

NEW QUESTION # 73
You are deploying a microservices application to Kubernetes using a CI/CD pipeline. Which of the following tools are most commonly used for managing the deployment process and ensuring rolling updates?

A. Helm
B. kubectl
C. Kubernetes Deployment
D. Jenkins
E. Docker Compose

Answer: A,C

Explanation:
Helm is a package manager for Kubernetes, simplifying the definition and deployment of complex applications. Kubernetes Deployment objects manage the rolling updates of your application, ensuring smooth transitions and high availability.

NEW QUESTION # 74
You are setting up a new Kubernetes cluster and need to configure a network policy that allows traff... This content requires a subscription.

Answer: D

Explanation:
Option 'A' is the correct choice- It defines a network policy that allows traffic from Pods within the same namespace by using an empty •podSelectof _ Options 'B', 'D' and 'E' all define policies that either allow traffic from specific namespaces or from specific IP ranges, which are not suitable for this scenario.

NEW QUESTION # 75
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 a pod disruption budget (PDB) to prevent a large number of pods from being deleted simultaneously.
B. Enable persistent volumes to store application data on a separate storage system.
C. Use a custom resource definition (CRD) to manage the high availability of the application.
D. Configure the deployment with a low number of replicas and use a service to expose the application.
E. Configure the deployment with a high number of replicas and use a load balancer to distribute traffic.

Answer: A,E

Explanation:
To achieve high availability for a stateless application in a Kubernetes cluster, you need to implement the following configurations: Configure the deployment with a high number of replicas: This ensures that multiple instances of the application are running concurrently, and if one node fails, the others can take over the load. The number of replicas should be sufficient to accommodate the expected traffic and handle potential node failures. Use a load balancer to distribute traffic: A load balancer acts as a central point for incoming traffic and distributes it across the different instances of the application. This provides a single point of access and load balancing capabilities. By using a load balancer, you ensure that traffic is directed to healthy instances, even if some nodes are unavailable. Configure a pod disruption budget (PDB): A PDB is a Kubernetes resource that prevents a large number of pods from being deleted simultaneousl . This is im ortant for ensurin that thea lication remains available even if a node is undergoing maintenance or fails. By configuring a PDB, you specify a minimum number of pods that must be running for the deployment, preventing sudden disruptions due to node failures or updates. These configurations work together to ensure high availability for the application, even in the face of node failures. Note that using persistent volumes is not strictly necessary for high availability in a stateless application. Stateless applications do not store data persistently, so data loss on a single node does not affect the application's availability.

NEW QUESTION # 76
What is the smallest possible unit in Kubernetes to run a container?

A. pod
B. container
C. service
D. docker

Answer: A

Explanation:
https://kubernetes.io/docs/concepts/workloads/pods/

NEW QUESTION # 77
Consider a Kubernetes deployment where you have a microservice responsible for user authentication. You want to ensure that any communication to this service is encrypted and secure. What Kubernetes feature or open standard can help achieve this?

A. TLS/SSL
B. Open Policy Agent (OPA)
C. NetworkPolicy
D. Kubernetes RBAC
E. Pod Security Policies (PSPs)

Answer: A

Explanation:
TLS/SSL is a standard protocol for encrypting communication between applications. You can configure your authentication service and its clients to use TLS/SSL to ensure secure communication between them. While other options like PSPs, NetworkPolicy, and RBAC are related to security, they don't specifically address the encryption aspect of communication-

NEW QUESTION # 78
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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q73-Q78):

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