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Linux Foundation CKA Reliable Exam Tips - New CKA Mock Test

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The CKA Certification Exam is aimed at IT professionals who have experience with Kubernetes and want to demonstrate their expertise in managing Kubernetes clusters. CKA exam consists of a set of performance-based tasks that test the candidate's ability to perform common Kubernetes administration tasks, such as deploying and managing applications, configuring and securing Kubernetes clusters, and troubleshooting common issues.

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q37-Q42):

NEW QUESTION # 37
You are running a stateful application on Kubernetes with a Deployment that manages five pods. Each pod has a persistent volume claim (PVC) that mounts a volume to store application dat a. You need to ensure that the pods are always deployed in the same order and that data is consistently accessed from the same PVC. How can you achieve this using Kubernetes features?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Enable StatefulSet: Create a StatefulSet instead of a Deployment. StatefulSets are specifically designed to manage stateful applications.

2. Use the 'podManagementPolicy' Field: Set the 'podManagementPolicy' field to 'OrderedReady' in the spec' section of your StatefulSet to ensure that pods are deployed in the same order and become ready before new pods are deployed. This policy guarantees that the previous pod is ready before the next one is started.

3. Utilize Persistent Volumes: Ensure that your PVCs are bound to persistent volumes (PVs). PVs are the underlying storage resources that back your PVCs. They are usually provisioned using a storage class.

4. Set 'serviceName': The 'serviceName' field should be specified in the StatefulSet to create a service for accessing the application. This service allows you to access the application based on its name, regardless of which pod is currently serving the requests.

5. Verify Deployment: After applying the YAML, check the status of your StatefulSet using 'kubectl get statefulset my-stateful-app'. Ensure that the pods are deployed in the specified order and are running. You can also verify the PVCs using 'kubectl get pvc' to make sure they are bound to the correct PVs.

NEW QUESTION # 38
You have a Deployment named 'mysql-deployment' running a MySQL database server. You need to store the MySQL root password securely using a Secret. This password should be used by the database server when it starts.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Secret:
- Create a Secret named 'mysql-password' to store the root password.
- Use the 'kubectl create secret generic' command with the '--from-literal' flag to create a generic Secret with a key-value pair:
kubectl create secret generic mysql-password -from-literal=mysql-root password="your_strong_password"
2. Modify the Deployment:
- Update the 'mysql-deployment' Deployment's Pod template to mount the mysql-password' Secret as a volume.
- Use 'volumeMounts' to specify where the Secret should be mounted within the container, and 'volumes' to define the Secret as a volume source.
- Update the MySQL server's configuration (e.g., the 'my.cnf file) to read the password from the mounted volume.

3. Apply the Changes: - Apply the modified Deployment YAML using 'kubectl apply -f mysql-deployment.yamP. 4. Restart the MySQL Pod: - Restart the MySQL pod for it to read the password from the mounted volume. This can be achieved using 'kubectl delete pod'. 5. Verify the Password: - Connect to the MySQL database using the provided password and confirm it works correctly.

NEW QUESTION # 39
List all persistent volumes sorted by capacity, saving the full kubectl output to /opt/KUCC00102/volume_list.
Use kubectl 's own functionality for sorting the output, and do not manipulate it any further.

Answer:

Explanation:

NEW QUESTION # 40
List the nginx pod with custom columns POD_NAME and POD_STATUS

Answer:

Explanation:
kubectl get po -o=custom-columns="POD_NAME:.metadata.name,
POD_STATUS:.status.containerStatuses[].state"

NEW QUESTION # 41
Create a pod with environment variables as var1=value1.Check the environment variable in pod See the solution below.

Answer:

Explanation:
kubectl run nginx --image=nginx --restart=Never --env=var1=value1
# then
kubectl exec -it nginx -- env
# or
kubectl exec -it nginx -- sh -c 'echo $var1'
# or
kubectl describe po nginx | grep value1

NEW QUESTION # 42
......

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