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New CKAD Online Exam 100% Pass | Pass-Sure Reliable CKAD Exam Testking: Linux Foundation Certified Kubernetes Application Developer Exam

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To prepare for the CKAD Certification Exam, candidates should have a solid understanding of Kubernetes architecture and concepts, as well as experience working with Kubernetes in a production environment. The Linux Foundation offers a range of training courses and resources to help candidates prepare for the exam, including online courses, practice exams, and study guides. The Linux Foundation also provides a free Kubernetes training course, which covers the basic concepts of Kubernetes and is an excellent starting point for candidates who are new to the platform.

Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q121-Q126):

NEW QUESTION # 121
Exhibit:

Context
A web application requires a specific version of redis to be used as a cache.
Task
Create a pod with the following characteristics, and leave it running when complete:
* The pod must run in the web namespace.
The namespace has already been created
* The name of the pod should be cache
* Use the Ifccncf/redis image with the 3.2 tag
* Expose port 6379

A. Solution:
B. Solution:

Answer: B

NEW QUESTION # 122
Context

Task:
The pod for the Deployment named nosql in the craytisn namespace fails to start because its container runs out of resources.
Update the nosol Deployment so that the Pod:
1) Request 160M of memory for its Container
2) Limits the memory to half the maximum memory constraint set for the crayfah name space.

Answer:

Explanation:
Solution:

NEW QUESTION # 123
You have a web application that requires a specific sidecar container to perform certain tasks like logging and monitoring. You need to ensure that this sidecar container iS always running alongside your application pod, even it the main application pod restarts or iS deleted and recreated. How would you achieve this using a DaemonSet in Kubernetes?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Define the DaemonSet YAML: Create a YAML file that defines the DaemonSet configuration. This file will include the following key sections:
- Metadata Includes the name and labels for the DaemonSet.
- Spec: Defines the deployment details:
- Selector: Matches the labels of the pods that the DaemonSet should manage.
- Template: Contains the pod definition:
- Containers: Defines the main application container and the sidecar container.
- Ensure the sidecar container has appropriate resources and environment variables.
- Include any necessary ports or volume mounts for the sidecar container.
- UpdateStrategy: You might want to control the update strategy (RollingUpdate or Recreate) if you have multiple nodes.

2. Create the Daemonset Apply the Daemonset YAML file to your Kubernetes cluster using 'kubectl apply -f daemonset.yamr. This will create the DaemonSet and stan deploying tne pods on each node. 3. Verify Deployment: Use 'kubectl get daemonsetS to check the status of the DaemonSet. Verify that the pods are running on each node. 4. Testing and Monitoring: - Restart or Delete the Main App Pod: Observe how the sidecar container continues running alongside the main app pod, even when the main pod is restarted or deleted and recreated. - Check Logs If your sidecar container is responsible for logging, use 'kubectl logs to check the logs from the sidecar container This approach ensures that the sidecar container remains in a ready state on each node and is always available to support your application pod, fulfilling the requirements for logging and monitoring even when the main pod restarts or is recreated.

NEW QUESTION # 124
Context

A web application requires a specific version of redis to be used as a cache.
Task
Create a pod with the following characteristics, and leave it running when complete:
* The pod must run in the web namespace.
The namespace has already been created
* The name of the pod should be cache
* Use the Ifccncf/redis image with the 3.2 tag
* Expose port 6379

Answer:

Explanation:
Solution:

NEW QUESTION # 125
You have a Deployment named 'web-apps that runs 3 replicas of a web application container. This application relies on a database service, also deployed as a Deployment named 'db-service' You need to implement a sidecar pattern using the 'initContainer' feature to ensure that the database service is up and running before the web application container starts. The web application container should only start once the database is reachable.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the 'initcontainer':
- Add a new container definition within the 'spec.template.spec.initContainerS section of the 'web-app' Deployment.
- Name the container as 'db-checker'
- Specify an image that will be used to perform the database health check. You can use a simple image like 'busybox' and install 'curl' in the 'initContainer' to perform the health check.
- The 'command' for the 'initcontainer' should run a 'while' loop that keeps checking the database service's health endpoint until it returns a successful status code.
- You can define the health endpoint in the 'db-service' Deployment's service definition.

2. Update the 'db-service' Deployment - Ensure that the 'db-servjce' Deployment includes a health cneck endpoint in its service definition. - For example, you can expose a health endpoint at 'http://db-service:5432/health' in your database service's configuration. - The health endpoint should return a successful status code (e.g., 200) if the database is running and ready. - If the database is not reachable, the endpoint should return an error code.

3. Apply the changes: - Apply the updated 'web-app' and 'db-service' Deployment YAML files to your Kubernetes cluster using 'kubectl apply' 4. Verify the implementation: - Once the Deployment iS updated, verity that the 'web-app' pods only start atter the 'db-service' pods are ready. - You can observe the 'initcontainer' logs tor the 'db-checker' container to confirm that the health checks are being performed. - You can also monitor the 'db-service' pods to ensure they are in a 'Running' state. This setup will ensure that the 'web-app' containers will not start until the 'db-service' is reachable and healthy. This ensures that the web application has access to the database and can function properly.,

NEW QUESTION # 126
......

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