FREE PDF 2025 LINUX FOUNDATION CKAD MARVELOUS RELIABLE EXAM QUESTION

Free PDF 2025 Linux Foundation CKAD Marvelous Reliable Exam Question

Free PDF 2025 Linux Foundation CKAD Marvelous Reliable Exam Question

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Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q68-Q73):

NEW QUESTION # 68
You're working on a Kubernetes application that involves retrieving data from a database. You have a Deployment With multiple pods, each accessing the database directly. To improve the application's performance and reliability, you want to implement an adapter pattern that introduces a service layer to handle database interactions. This layer should be responsible for connection pooling, caching, and error handling, making the application more resilient to database outages.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Service Account:
- Create a service account for the application. This will be used by the service layer to access the database.

- Apply the service account to the cluster: 'kubectl apply -f db-setvice-account.yamr 2. Create a Role and Role8inding: - Create a role that grants tne necessary permissions to access the database.

- Create a role binding that associates the role with the service account

- Apply the role and role binding to the cluster: - 'kubectl apply -f db-access-role.yaml' - 'kubectl apply -f db-access-binding.yaml 3. Create the Service Layer Deployment: - Deploy the service layer component. This can be a containerized application that handles database interactions.

- Apply the deployment: 'kubectl apply -f db.-service-yaml 4. Create a Secret for Database Credentials: - Create a secret to store sensitive database credentials.

- Apply the secret 'kubectl apply -f db-credentials.yaml' 5. Create a Service for the Service Layer: - Create a service to expose the service layer to the application pods.

- Apply the service: 'kuoectl apply -f db-seMce.yaml' 6. Llpdate the Application Deployment: - Update the Deployment for your main application to use the service layer.

T Test and Verify' - Verify the changes: - Check the logs for both the service layer and the application. - Test your application's functionality. Note: - Ensure to replace placeholders like ''. ''. ''. ''. ''. ''. and with your actual values. - This is a basic example, and you may need to adjust the configuration based on your specific service layer and database implementation. ,


NEW QUESTION # 69

Context
You sometimes need to observe a pod's logs, and write those logs to a file for further analysis.
Task
Please complete the following;
* Deploy the counter pod to the cluster using the provided YAMLspec file at /opt/KDOB00201/counter.yaml
* Retrieve all currently available application logs from the running pod and store them in the file
/opt/KDOB0020l/log_Output.txt, which has already been created

Answer:

Explanation:
See the solution below.
Explanation
Solution:



NEW QUESTION # 70
Context

Task:
A Dockerfile has been prepared at -/human-stork/build/Dockerfile
1) Using the prepared Dockerfile, build a container image with the name macque and lag 3.0. You may install and use the tool of your choice.

2) Using the tool of your choice export the built container image in OC-format and store it at -/human stork/macque 3.0 tar

Answer:

Explanation:
Solution:


NEW QUESTION # 71
You are running a web application on a Kubernetes cluster, and you want to ensure that thecontainer running your application is protected from potential security vulnerabilities. You are specifically concerned about unauthorized access to the container's filesystem. Explain how you would implement AppArmor profiles to restrict access to the container's filesystem.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the AppArmor Profile:
- Create a new AppArmor profile file, for example, 'nginx-apparmor.conf, within your Kubernetes configuration directory.
- Within this file, define the restrictions for the container.
- For instance, to allow access to specific directories and files:
# include common AppArmor profile
include /etc/apparmor.d/abstractions/base/nginx.apparmor
# Allow access to specific directories
/var/www/html r,
/etc/nginx r,
# Allow access to specific files
/etc/nginx/nginx.conf r,
/usr/sbin/nginx r,
# Deny access to all other files and directories
Deny
2. Load the AppArmor Profile:
- Use the create configmap' command to create a ConfigMap containing your AppArmor profile:
Bash
kubectl create configmap nginx-apparmor-profile --from-file=nginx-apparmor.conf
3. Apply the Profile to Your Deployment:
- Update your Deployment YAML file to include the AppArmor profile:

4. Restart the Pods: - Apply the updated Deployment YAML using 'kubectl apply -f nginx-deployment.yaml' - The updated deployment will restart the pods with the new AppArmor profile. 5. Verify the Profile: - Check the status of the pods with 'kubectl describe pod - Look for the "Security Context" section and verify that the AppArmor profile is correctly applied. 6. Test the Restrictions: - Try to access files or directories that are not allowed by your AppArmor profile. - This will help you confirm that the profile is effectively restricting access.


NEW QUESTION # 72
Refer to Exhibit.

Set Configuration Context:
[student@node-1] $ | kubectl
Config use-context k8s
Context
You sometimes need to observe a pod's logs, and write those logs to a file for further analysis.
Task
Please complete the following;
* Deploy the counter pod to the cluster using the provided YAMLspec file at /opt/KDOB00201/counter.yaml
* Retrieve all currently available application logs from the running pod and store them in the file /opt/KDOB0020l/log_Output.txt, which has already been created

Answer:

Explanation:
Solution:
To deploy the counter pod to the cluster using the provided YAML spec file, you can use the kubectl apply command. The apply command creates and updates resources in a cluster.
kubectl apply -f /opt/KDOB00201/counter.yaml
This command will create the pod in the cluster. You can use the kubectl get pods command to check the status of the pod and ensure that it is running.
kubectl get pods
To retrieve all currently available application logs from the running pod and store them in the file /opt/KDOB0020l/log_Output.txt, you can use the kubectl logs command. The logs command retrieves logs from a container in a pod.
kubectl logs -f <pod-name> > /opt/KDOB0020l/log_Output.txt
Replace <pod-name> with the name of the pod.
You can also use -f option to stream the logs.
kubectl logs -f <pod-name> > /opt/KDOB0020l/log_Output.txt &
This command will retrieve the logs from the pod and write them to the /opt/KDOB0020l/log_Output.txt file.
Please note that the above command will retrieve all logs from the pod, including previous logs. If you want to retrieve only the new logs that are generated after running the command, you can add the --since flag to the kubectl logs command and specify a duration, for example --since=24h for logs generated in the last 24 hours.
Also, please note that, if the pod has multiple containers, you need to specify the container name using -c option.
kubectl logs -f <pod-name> -c <container-name> > /opt/KDOB0020l/log_Output.txt The above command will redirect the logs of the specified container to the file.



NEW QUESTION # 73
......

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