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Free PDF Linux Foundation - KCNA - Useful Kubernetes and Cloud Native Associate Exam Tutorial

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Linux Foundation is a non-profit organization that provides support and resources for open-source software projects. One of its most popular offerings is the Kubernetes and Cloud Native Associate (KCNA) certification exam. Kubernetes and Cloud Native Associate certification is designed for professionals who want to demonstrate their expertise in managing and deploying cloud-native applications using Kubernetes.

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q198-Q203):

NEW QUESTION # 198
A ________ is a ready-to-run software package, containing everything needed to run an application.

• A. Container Repository
• B. Container Runtime
• C. Container Image
• D. Docker

Answer: C

Explanation:
https://kubernetes.io/docs/concepts/containers/#container-images

 

NEW QUESTION # 199
Your Kubernetes cluster is running in a public cloud environment. You want to expose a specific service to the internet using a public IP address. Which Kubernetes service type would you choose?

• A. NodePort
• B. ClusterlP
• C. LoadBalancer
• D. ExternalName
• E. Headless

Answer: C

Explanation:
The correct answer is 'LoadBalancer. When you create a Kubernetes Service of type 'LoadBalancer' in a public cloud environment, the cloud provider automatically provisions a public IP address and load balancer to route traffic to your service. This allows you to expose your service to the internet with a public endpoint. The other options are not suitable for this scenario: 'ClusterlP' creates an internal IP address within the cluster, 'NodePort' exposes the service on a specific port on the node's IP, 'ExternalName' acts as an alias for an external DNS name, and 'Headless' creates a service without a cluster IP.

 

NEW QUESTION # 200
You are using Prometheus to monitor a microservices-based application. You want to create an alert that triggers when the average response time of a specific service exceeds 500 milliseconds for the last 5 minutes. What Prometheus query can achieve this?

• A.
• B.
• C.
• D.
• E.

Answer: A

Explanation:
The query •avg_over_time(http_request_duration_seconds{service=""}[5m]) > 0.5* calculates the average response time over the last 5 minutes for the specified service. If this average exceeds 0.5 seconds (500 milliseconds), the alert will trigger. The other options are not suitable for this specific scenario.

 

NEW QUESTION # 201
Which of the following is an advantage a cloud-native microservices application has over monolithic applications?

• A. Cloud-native microservices applications tend to be faster and more responsive than monolithic applications.
• B. Cloud-native microservice applications tend to be easier to troubleshoot.
• C. Cloud-native microservice applications tend to be easier to scale and perform updates on.

Answer: C

Explanation:
Cloud-native applications tend to be microservice base, they have individual services that can be independently scaled, updated and rolled back. This makes scaling and update operations simpler and less risky.

 

NEW QUESTION # 202
What are the key differences between a Kubernetes Pod and a Docker container? Provide examples of how they are used in a Kubernetes deployment.

• A. A Docker container is managed by Kubernetes, while a Pod is managed by Docker.
• B. A Pod is a single running container, while a Docker container can run multiple applications.
• C. A Pod is a physical machine, while a Docker container is a virtual machine.
• D. A Pod is a cloud-native application, while a Docker container is a traditional application.
• E. A Pod is a logical grouping of one or more containers, while a Docker container is a single running instance of an image.

Answer: E

Explanation:
A Pod in Kubernetes is the smallest deployable unit. It represents a group of one or more containers that share resources and networking. Docker containers, on the other hand, are individual running instances of Docker images. Examples: Pod: You could have a Pod that runs a web server container, a database container, and a logging container, all working together as a single unit. Kubernetes manages the scheduling, networking, and resource allocation for the entire Pod. Docker Container: You could run a single Docker container for a web server application on a single machine.

 

NEW QUESTION # 203
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