VALID CKA LEARNING MATERIALS, VALID CKA TEST DURATION

Valid CKA Learning Materials, Valid CKA Test Duration

Valid CKA Learning Materials, Valid CKA Test Duration

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Tags: Valid CKA Learning Materials, Valid CKA Test Duration, CKA Brain Exam, CKA Test Centres, Customized CKA Lab Simulation

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q63-Q68):

NEW QUESTION # 63
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 # 64
Create a pod that echo "hello world" and then exists. Have the pod deleted automatically when it's completed

Answer:

Explanation:
kubectl run busybox --image=busybox -it --rm --restart=Never -- /bin/sh -c 'echo hello world' kubectl get po # You shouldn't see pod with the name "busybox"


NEW QUESTION # 65
Print pod name and start time to "/opt/pod-status" file

Answer:

Explanation:
kubect1 get pods -o=jsonpath='{range
.items[*]}{.metadata.name}{"t"}{.status.podIP}{"n"}{end}'


NEW QUESTION # 66
Your Kubernetes cluster is experiencing a high number of pod restarts in the 'database-service' Deployment. The logs show errors related to "connection refused" from the database service. You need to diagnose the issue and resolve it.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Check the Database Service:
- Verify the database service is running and healthy:
- Use 'kubectl get services database-service' to check the service status.
- If the service is not running, try restarting it with 'kubectl delete service database-service' followed by 'kubectl apply -f database-service.yaml'
2. Investigate Network Connectivity:
- Check if pods in the 'database-service' Deployment can connect to the database service:
- Use 'kubectl exec -it -n bash' to enter a pod in the Deployment.
- Run 'ping database-service' or 'telnet database-service to test network connectivity.
- If ping or telnet fails, there might be a network issue between the pods and the database service.
3. Examine Service Configuration:
- Inspect the database service YAML:
- Verify the port mapping in the service definition matches the port that the database service listens on.
- Ensure the service selector matches the labels of the database pods.
- Example:

4. Check for Network Policies: - Determine if any network policies are blocking traffic between the database service and the pods: - Use 'kubectl get networkpolicies -n ' to list network policies. - Examine the policies to see if they are blocking traffic based on labels, ports, or other criteria. 5. Troubleshoot Database Service: - Verify the database service itself is running and accessible: - If you can access the database service directly from outside the cluster, but the pods cannot connect, there may be an issue with the database service itself. - Run tests to ensure the database is functioning correctly. 6. Test and Redeploy: - After making changes to the service definition, apply the update: - 'kubectl apply -f database-service.yaml' - Monitor the pod restarts. If the issue persists, consider further troubleshooting steps, such as inspecting firewall rules or DNS resolution.


NEW QUESTION # 67
Update the deployment with the image version 1.17.4 and verify

  • A. kubectl set image deploy/webapp nginx=nginx:1.17.4
    //Verify
    kubectl describe deploy webapp | grep Image
    kubectl get deploy -
    {.metadata.name}{"t"}{.spec.template.spec.containers[*].i
    mage}{"n"}'
  • B. kubectl set image deploy/webapp nginx=nginx:1.17.4
    //Verify
    kubectl describe deploy webapp | grep Image
    kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]}
    {.metadata.name}{"t"}{.spec.template.spec.containers[*].i
    mage}{"n"}'

Answer: B


NEW QUESTION # 68
......

The Certified Kubernetes Administrator (CKA) Program Exam (CKA) certification helps you advance your career and even secure a pay raise. Today, the Linux Foundation certification is an excellent choice for career growth, and to obtain it, you need to pass the CKA exam which is a time-based exam. To prepare for the CKA Exam successfully in a short time, it's essential to prepare with real CKA exam questions. If you don't prepare with CKA updated dumps, you will fail and lose time and money.

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