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The CKA program is suitable for professionals who are interested in deploying, managing, and scaling containerized applications. Certified Kubernetes Administrator (CKA) Program Exam certification exam is intended for system administrators, DevOps engineers, and developers who are seeking to enhance their skills in Kubernetes administration. The CKA Exam is a challenging test that requires a deep understanding of Kubernetes architecture, containerization concepts, and network design. CKA exam aims to validate the candidate's expertise in Kubernetes administration and help them stand out in the job market.
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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q28-Q33):
NEW QUESTION # 28
Create a namespace called 'development' and a pod with image nginx called nginx on this namespace.
Answer:
Explanation:
kubectl create namespace development
kubectl run nginx --image=nginx --restart=Never -n development
NEW QUESTION # 29
Scale down the deployment to 1 replica
Answer:
Explanation:
kubectl scale deployment webapp -replicas=1 //Verify kubectl get deploy kubectl get po,rs
NEW QUESTION # 30
You are setting up a new Kubernetes cluster with a highly sensitive application that requires access control at the pod level. Explain how you can use NetworkPolicy to restrict access to pods within your cluster.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create a NetworkPolicy Resource: Define a 'NetworkPolicy' resource using a YAML file. The
'NetworkPolicy' resource will contain the rules for network traffic access to the pods. You can use 'kubectl create -f networkpolicy.yaml' to create the NetworkPolicy resource.
2. Set 'podSelectoo: Use the podSelector' field to identify the pods that will be affected by the policy. In this example, we are targeting pods with the label 'app: sensitive-app'. 3. Define 'ingress' and 'egress' Rules: Use the 'ingress' and 'egress' sections to define the rules for incoming and outgoing traffic. 'ingress': This section specifies which pods or services are allowed to send traffic to the pods targeted by the 'NetworkPolicy'. Here, we are allowing traffic from pods labeled app: trusted-service'. 'egress': This section specifies which destinations the pods targeted by the NetworkPolicy are allowed to send traffic to. In this example, we are allowing egress traffic to the IP address range 10.0.0.0/16. 4. Implement the "NetworkPolicy': Apply the YAML file using 'kubectl apply -f networkpolicy.yaml'. Once applied, the NetworkPolicy will be enforced, blocking any traffic that does not meet the specified rules.
NEW QUESTION # 31
Score: 5%
Task
Monitor the logs of pod bar and:
* Extract log lines corresponding to error
* Write them to /opt/KUTR00101/bar
Answer:
Explanation:
See the solution below.
Explanation
Solution:
kubectl logs bar | grep 'unable-to-access-website' > /opt/KUTR00101/bar cat /opt/KUTR00101/bar
NEW QUESTION # 32
You have a Deployment named 'database-deployment' with 2 replicas of a database container. You want to implement a rolling update strategy that allows for a maximum of one pod to be unavailable at any given time. However, you also want to ensure that the database container is restarted automatically when it encounters a failure or crashes. This restart policy should be applied only to the database containers within the deployment and not affect any other containers in the same pod.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Update the 'replicas' to 2.
- Define 'maxUnavailable: 1' and 'maxSurge: 0' in the strategy.rollingUpdate' section to control the rolling update process.
- Configure a 'strategy.type' to 'RollingUpdate' to trigger a rolling update when the deployment is updated.
- Set 'spec.template.spec.containers[0].restartPolicy: Always' to ensure the database container restarts automatically when it encounters a failure.
2. Create the Deployment: - Apply the updated YAML file using 'kubectl apply -f database-deployment.yaml' 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments database-deployment' to confirm the rollout and updated replica count. 4. Test the Restart Policy: - Trigger a failure in the 'database' container within one of the pods. This can be done by sending a SIGKILL signal to the container or by simulating a crash within the container itself. - Observe that the 'database' container will be restarted automatically while other containers in the same pod will remain unaffected. 5. Trigger the Automatic Update: - Push a new image to the 'my-database-image:latest registry. 6. Monitor the Deployment: - Use "kubectl get pods -l app=database' to monitor the pod updates during the rolling update process. 7. Check for Successful Update: - Once the deployment is complete, use 'kubectl describe deployment database-deployment' to see that the 'updatedReplicas' field matches the 'replicas' field, indicating a successful update.
NEW QUESTION # 33
......
The Linux Foundation CKA certification verifies that you have a basic understanding of Certified Kubernetes Administrator (CKA) Program Exam concepts and virtualization. Success in the CKA exam of the Linux Foundation CKA certificate also proves your knowledge of basic troubleshooting concepts and data center technology. When you earn the CKA Certification you will get reliable exam guide materials.
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