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Our Linux Foundation CKAD desktop and web-based practice software are embedded with mock exams, just like the actual Linux Foundation Data Center certification exam. The TestkingPass designs its mock papers so smartly that you can easily prepare for the Linux Foundation Certified Kubernetes Application Developer Exam exam. All the essential questions are included, which have a huge chance of appearing in the real Linux Foundation Certified Kubernetes Application Developer Exam exam. Our mock exams may be customized so that you can change the topics and timings for each exam according to your preparation.

The CKAD exam is intended for developers who have some experience working with Kubernetes and want to demonstrate their expertise in developing Kubernetes-based applications. CKAD exam is designed to test the practical skills of an individual in working with Kubernetes and its associated tools, rather than just their theoretical knowledge. Passing the CKAD Exam is a valuable credential for developers who want to demonstrate their proficiency in developing cloud-native applications on Kubernetes, and it can open up new job opportunities and career advancement prospects.

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Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q157-Q162):

NEW QUESTION # 157
You are running a web application on Kubernetes, and you need to schedule a daily backup of your application's dat a. The backup process involves running a script that archives the database and uploads it to a remote storage service. Explain how you would implement this using a CronJ0b in Kubernetes. Provide a sample YAML configuration for the Cronjob.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Container Image:
- Create a Dockerfile that packages the backup script and any necessary dependencies into a container image-
- Build tne image and push it to a container registry (e.g., Docker Hub).
dockefflle
FROM ubuntu:latest
# Install necessary packages
RUN apt-get update && apt-get install -y zip
# Copy the backup script to the container
COPY backup.sh 'backup.sh
# Set entrypoint to the backup script
ENTRYPOINT ["/backup.sh"]
2. Create the CronJob YAML:
- Define the 'cronJob' resource in a YAML file. Specify the schedule, the container image, and the command to run.

3. Apply the CronJob: - Apply the YAML file to your Kubernetes cluster using 'kubectl apply -f cronjob.yamr 4. Verification: - Use 'kubectl get cronjobs' to check if the CronJob was successfully created- - Check the Kubernetes logs for the CronJob to ensure it's running as expected.

NEW QUESTION # 158
You are building a microservice-based application with a frontend service and a backend service. The frontend service needs to communicate with the backend service via a Kubernetes Service. Design and implement a robust solution for the frontend service to discover the backend service's IP address and port, ensuring seamless communication between the services.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Backend Service:
- Define a Kubernetes Service for the backend service, exposing it on a specific port.
- Ensure the service's 'selector' matches the labels of your backend pods.

2. Configure Frontend Service: - Create a Kubernetes Deployment for the frontend service. - Inject the backend service's name and pon into the frontend container's environment variables. This will allow the frontend service to access the backend service's information.

3. Create a ConfigMap for Backend Service Informatiom - Create a ConfigMap to store the backend service's information, including its name and port

4. Deploy the Services and ConfigMap: - Apply the YAML files for the backend service, frontend deployment, and ConfigMap to your Kubernetes cluster using kubectl apply -f 5. Test Communication: - Access the frontend service (e.g., through a LoadBalancer or Ingress) and ensure it successfully communicates with the backend service. Notes: - This approach utilizes a ConfigMap to store the backend service information, making it easy to update and manage the connection information. - The frontend service can access the backend service's information through environment variables, ensuring consistency in communication. - By utilizing Kubernetes Services, the trontend service can seamlessly communicate with the backend service without knowing the specific IP addresses or ports of individual pods. - The frontend service should be designed to handle potential errors when attempting to connect to the backend service (e.g., timeouts, network issues). Additional Tips for Robust Communication: - Health Checks: LJse Liveness and Readiness probes to ensure that only healthy backend pods are included in the backend service. - Service Discovery: Consider using advanced service discovery mechanisms like Consul or etcd to enable dynamic service discovery and updates. - Network Policies: Apply network policies to control communication between services, improving security and preventing unauthorized access.,

NEW QUESTION # 159
You have a Deployment running a web application built With a Node.js container. The application currently uses an older version of the Node.js runtime, and you need to upgrade to a newer versiom Describe the steps involved in modifying the container image to include the new Node.js runtime without rebuilding the entire application.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Dockerfile:
- Create a new 'Dockerfile' With the following content

- Replace With the name of the existing Docker image used by your Deployment. - This Dockefflle uses a multi-stage build approach. It starts with a new Node.js base image and copies the application code from the existing image. This allows you to update the runtime without rebuilding the entire application. 2. Build the New Image: - Build tne image using the Dockerflle: docker build -t updated-image:latest 3. Update the Deployment - Modify your Deployment YAML file to use the newly built image:

4. Apply the Changes: - Apply the updated Deployment using 'kubectl apply -f deployment.yamr. This will trigger a rolling update to the pods using the new image. 5. Verify the Update: - Check the logs of the pods using 'kubectl logs -f ' . You should see the application running with the updated Node.js version. 6. Test the Application: - Access your application and ensure it functions correctly with the new Node.js runtime.

NEW QUESTION # 160

Task:
Update the Deployment app-1 in the frontend namespace to use the existing ServiceAccount app.

Answer:

Explanation:
See the solution below.
Explanation
Solution:
Text Description automatically generated

NEW QUESTION # 161
Exhibit:

Context
You are tasked to create a secret and consume the secret in a pod using environment variables as follow:
Task
* Create a secret named another-secret with a key/value pair; key1/value4
* Start an nginx pod named nginx-secret using container image nginx, and add an environment variable exposing the value of the secret key key 1, using COOL_VARIABLE as the name for the environment variable inside the pod

A. Solution:
B. Solution:

Answer: A

NEW QUESTION # 162
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