CKA EXAM CRAM PDF | EXAMS CKA TORRENT

CKA Exam Cram Pdf | Exams CKA Torrent

CKA Exam Cram Pdf | Exams CKA Torrent

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The CKA exam is a hands-on, practical test that requires candidates to perform tasks on a live Kubernetes cluster. CKA exam is conducted online and comprises of 24 performance-based tasks that must be completed within 3 hours. To pass the exam, candidates must score 74% or higher. The CKA Certification is valid for three years, after which candidates can renew their certification by passing a recertification exam. The CKA program provides a proven path to career advancement and recognition as a Kubernetes expert.

Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q16-Q21):

NEW QUESTION # 16
You have a pod that uses a PersistentVolumeClaim for its storage. The pod is deleted, but the data on the volume is still present. Explain why the data is not deleted and how you can change this behavior.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
When a pod is deleted, the data on the volume is not automatically deleted by default. This is because the persistentVolumeReclaimPolicy' for the PersistentVolume is set to 'Retain' by default. This policy ensures that the volume is not deleted when the pod is deleted, preserving the data.
To delete the data when the pod is deleted, you need to modify the persistentVolumeReclaimPolicy' to 'Delete'. Here's how:
1. Update the PersistentVolume:
- Update the 'persistentVolumeReclaimPolicy' to 'Delete' in the PersistentVolume definition.

2. Apply the Changes: - Apply the updated PersistentVolume definition using 'kubectl apply -f my-pv.yaml'. Now, when the pod using this PersistentVolume is deleted, the volume and the data will also be deleted automatically.


NEW QUESTION # 17
You are managing a Kubernetes cluster where several pods are scheduled across multiple nodes. One of your deployments (named "wordpress") is using a custom resource definition (CRD) called "WordpressConfig" that defines the configuration for the Wordpress application. The "WordpressConfig" CRD includes parameters for database connections, security settings, and other application-specific settings. You want to ensure that the pods running the WordPress application are aware of the latest configuration changes to the "WordpressConfig" CRD, even if the pod is already running.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap:
- Define a ConfigMap named "wordpress-config" that will contain the current configuration from the
"WordpressConfig" CRD.
- Use the 'kubectl get wordpressconfig -o yaml' command to get the current configuration of the
"WordpressConfig" resource.
- Update the ConfigMap with the desired configuration data. You can achieve this by:
- Manually creating a ConfigMap with the configuration data.
- Creating a separate script or function to extract data from the "WordpressConfig" CRD and apply it to a ConfigMap.
- You can use the following YAML snippet as an example for the "wordpress-config" ConfigMap:

2. Update the Wordpress Deployment: - Modify the 'wordpress' Deployment to use the "wordpress-config" ConfigMap as a volume. - Mount the volume to the pod's container and ensure the application can access the configuration from the volume. - Update the Deployment YAML as follows:

3. Implement a Controller: - Create a custom controller that watches for changes in the "WordpressConfig" CRD. - When a change occurs, the controller should update the "wordpress-config" ConfigMap with the new configuration data. - This ensures that the ConfigMap stays in sync with the "WordpressConfig" resource. - The controller can be written using various languages like Go, Python, or Java. 4. Configure Pod Updates: - If your WordPress pods are not automatically restarted after the ConfigMap changes, you can trigger a restart using the 'kubectl rollout restart deployment wordpress' command. - Alternatively, you can set the 'imagePullPolicy' to in your Deployment configuration, which forces the pods to pull the new image and re-apply the configuration on each update. 5. Verify the Configuration: - Once you have implemented these steps, verify that the Wordpress pods are using the latest configuration from the ConfigMap. - Use the 'kubectl get pods -l app=wordpress -o yamp command to inspect the running pods and verify the volume mount and the path where the configuration data is located. - Access the running WordPress application to confirm that the new configuration is being applied. By following these steps, you will ensure that your Wordpress pods are always using the latest configuration from the "WordpressConfig" CRD, regardless of whether the pods are already running or not. ,


NEW QUESTION # 18
Update the deployment with the image version 1.16.1 and verify the image and check the rollout history

Answer:

Explanation:
kubectl set image deploy/webapp nginx=nginx:1.16.1 kubectl describe deploy webapp | grep Image kubectl rollout history deploy webapp


NEW QUESTION # 19
You have a deployment named 'my-app' running a web application that uses an external database service. You need to configure a 'ClusterlP' service to route traffic to the external database service.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create the ClusterlP service:
- Create a 'ClusterlP' service that points to the external database service using the 'externalName' field.

2. Apply the service: - Apply the YAML file using 'kubectl apply -f external-db-service.yamr 3. Verify the service: - Check the status of the service using 'kubectl get services external-db-service -n ' 4. Test the service: - From a pod in the same namespace as the service, try to connect to the external database service using the 'external-db-service' service name and port. Note: - Replace with the actual namespace. - Replace 'my-external-db.example.com' with the actual hostname of your external database service. - Ensure that your cluster has access to the external database service.


NEW QUESTION # 20
You have a Kubernetes cluster with three nodes. Nodel and Node2 are in the 'default' availability zone, while Node3 is in the 'us-east-I a' availability zone. You want to ensure that pods are spread across all three nodes, considering the availability zones.
Describe how to configure the cluster to achieve this goal, specifically addressing how to leverage 'nodeSelector' and/or 'affinity' to enforce desired node placement. Explain the rationale behind your chosen approach.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Configure Node Labels
Label each node with its corresponding availability zone:
For Node1 and Node2 (in 'default' availability zone):
kubectl label node availability-zone=default
For Node3 (in availability zone):
kubectl label node availability-zone=us-east-Ia
Step 2: Use Node Selector
Use 'nodeSelector' in your Deployment or Pod definition to specify the desired availability zone:

This ensures pods with the 'nginx-deployment' label will be scheduled only on Node3. Step 3: Use Affinity (Optional) You can also use 'affinity' for more fine-grained control. For example, to ensure that pods are spread across different availability zones:

This configuration will prefer scheduling pods in different availability zones. Rationale: Node Selector: Provides a simple mechanism to direct pods to specific nodes based on labels. Affinity: Offers more advanced options, including 'podAntiAffinity" to spread pods across nodes (or availability zones) and 'podAffinity' to ensure pods are scheduled on the same node. Availability Zone: Distributes pods across different zones for high availability, as failures in one zone won't impact pods scheduled in other zones. ,


NEW QUESTION # 21
......

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