2025 New CKAD Dumps – Real Linux Foundation Exam Questions [Q45-Q68]

admin CKAD Linux Foundation August 14, 2025

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2025 New CKAD Dumps – Real Linux Foundation Exam Questions

Dependable CKAD Exam Dumps to Become Linux Foundation Certified

Linux Foundation CKAD certification exam is recognized globally as a standard of excellence in Kubernetes application development. Linux Foundation Certified Kubernetes Application Developer Exam certification demonstrates that a developer has the knowledge and skills to design, deploy, and manage Kubernetes-based applications. CKAD certification is highly valued by employers who are looking for developers with the skills to work with Kubernetes and to build and deploy cloud-native applications.

Q45. You have a Deployment named ‘api-deployment’ that runs an API server. The API server handles sensitive data and must have strong security measures. You want to ensure that all pods within the Deployment are running with a specific security context that limits their capabilities. Describe the steps to configure a Securitycontext in the Deployment to enforce these security restrictions.

Q46.

Task:
1) Create a secret named app-secret in the default namespace containing the following single key-value pair:
Key3: value1
2) Create a Pod named ngnix secret in the default namespace.Specify a single container using the nginx:stable image.
Add an environment variable named BEST_VARIABLE consuming the value of the secret key3.

Q47. You are creating a Deployment for a web application that uses a database for its data persistence. You want to scale the deployment horizontally, but you also want to ensure that each pod has access to the same database instance. Explain how you can use a ConfigMap to provide database connection details to each pod.

Q48. Context

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

Q49. You are developing a container image for a .NET Core application tnat requires a specific version of tne .NET Core SDK to be installed. How would you ensure that the correct SDK version is available within your Docker image during the build process?

Q50. Context

Context
As a Kubernetes application developer you will often find yourself needing to update a running application.
Task
Please complete the following:
* Update the app deployment in the kdpd00202 namespace with a maxSurge of 5% and a maxUnavailable of 2%
* Perform a rolling update of the web1 deployment, changing the Ifccncf/ngmx image version to 1.13
* Roll back the app deployment to the previous version

Q51. Context

Task:
1- Update the Propertunel scaling configuration of the Deployment web1 in the ckad00015 namespace setting maxSurge to 2 and maxUnavailable to 59
2- Update the web1 Deployment to use version tag 1.13.7 for the Ifconf/nginx container image.
3- Perform a rollback of the web1 Deployment to its previous version

Q52.

Task
A Deployment named backend-deployment in namespace staging runs a web application on port 8081.

Q53. Refer to Exhibit.

Task:
The pod for the Deployment named nosql in the craytisn namespace fails to start because its container runs out of resources.
Update the nosol Deployment so that the Pod:
1) Request 160M of memory for its Container
2) Limits the memory to half the maximum memory constraint set for the crayfah name space.

Q54. You are managing a Kubernetes cluster running a web application. You need to create a CronJob that automatically updates the web application’s database every night at 1:00 AM. The database update script iS located in a container image named ‘database-update:vl’. The script requires the following environment variables: ‘DATABASE_HOST’ , ‘DATABASE_USER’ , and ‘DATABASE_PASSWORD’. How would you create the CronJob YAML file to achieve this?

Q55. You have a microservice application that relies on a Redis cacne for data retrieval. Design a multi-container Pod that incorporates a Redis sidecar container to provide local caching within the Pod. Ensure that the main application container can access the Redis sidecar container within the same Pod Namespace Without needing to communicate with an external Redis cluster.

Q56. You are building a new web application that utilizes a microservice architecture- One of the microservices, ‘recommendation-service’, is responsible for providing personalized product recommendations to users.
This service uses a machine learning model for generating recommendations based on user purchase history and browsing behavior. The model is trained offline and its weights are stored in a ‘model-store’ service.
Design a mufti-container Pod for the ‘recommendation-service’ that incorporates the following considerations:
– The Pod should include a primary container for the ‘recommendation-service’ application.
– The Pod should include a secondary container that runs the ‘model-store’ service to provide access to the trained model weights.
– Both containers should share a common volume to ensure that the model weights are available to the ‘recommendation-service’ container-
– The recommendation-service’ snould be able to access the model weignts from the ‘model-store’ container witnout relying on a network call to another service-
– The recommendation-service’ container should be configured to periodically update the model weights from the ‘model-store’ container when a new version of the model is available.

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Deployment YAML:
– Define a Deployment with the name ‘recommendation-service’
– Set the replicas to for redundancy and scalability.
– Specify the labels Sapp: recommendation-service’ for selecting the Pods in the Deployment.
– Create a ‘template’ section to define the Pod specificatiom

2. Deploy the Resources: – Apply the Deployment using ‘kubectl apply -f deployment-yamp 3. Verify the Deployment: – Check the status of the Deployment using ‘kubectl get deployments recommendation-service and ensure that three Pods are running. 4. Contigure the ‘recommendation-service’ – Modify the ‘recommendation-service application to load the model weights from the specified path ClmodeVIatest-modeI_weightS). – Implement a mechanism within the ‘recommendation-service to periodically check tor updated model weights in the shared volume. 5. Configure the ‘model-store service: – Ensure that the model-store service is properly configured to store and retrieve the model weights. – Implement a mechanism in the ‘model-store’ service to notify the ‘recommendation-service when a new model version is available. This notification can be achieved using a shared volume or a separate messaging system. 6. Test the Application: – Send requests to the ‘recommendation-service’ to generate recommendations. – Monitor the ‘model-store’ service and the shared volume to verify that the model weights are being updated correctly and the recommendation- service’ is using the latest model version. Important Considerations: – Ensure that the ‘recommendation-service’ application is properly configured to access and load the model weights from the shared volume. – Implement a robust model management strategy, including versioning and rollback mechanisms, to ensure that the recommendation-service always uses the appropriate model. – Consider using a dedicated model store service that provides a dedicated API for retrieving and updating model weights. This can simplify the communication between the ‘recommendation-service’ and the model store. – Monitor the performance and resource usage of both services to ensure optimal performance.,

Q57. Refer to Exhibit.

Context
You have been tasked with scaling an existing deployment for availability, and creating a service to expose the deployment within your infrastructure.
Task
Start with the deployment named kdsn00101-deployment which has already been deployed to the namespace kdsn00101 . Edit it to:
* Add the func=webFrontEnd key/value label to the pod template metadata to identify the pod for the service definition
* Have 4 replicas
Next, create ana deploy in namespace kdsn00l01 a service that accomplishes the following:
* Exposes the service on TCP port 8080
* is mapped to me pods defined by the specification of kdsn00l01-deployment
* Is of type NodePort
* Has a name of cherry

Q58. You have a Kustomization file that defines a Deployment with two replicas. You want to configure the deployment to use a different image tag based on the environment it is deployed to- For example, in the ‘dev’ environment, the image tag should be ‘example/nginx:dev’ , while in the ‘prod’ environment, it should be ‘example:nginx:prod’. Describe how to achieve this using Kustomize.

Q59. You are running a microservice-based application on Kubernetes- You want to deploy a new version of one of your microservices, but you need to ensure a smootn rollout without causing downtime. Explain tne steps involved in implementing a blue-green deployment strategy for this microservice.

Q60. You have a Deployment named ‘web-apps that runs 3 replicas of a web application container. This application relies on a database service, also deployed as a Deployment named ‘db-service’ You need to implement a sidecar pattern using the ‘initContainer’ feature to ensure that the database service is up and running before the web application container starts. The web application container should only start once the database is reachable.

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the ‘initcontainer’:
– Add a new container definition within the ‘spec.template.spec.initContainerS section of the ‘web-app’ Deployment.
– Name the container as ‘db-checker’
– Specify an image that will be used to perform the database health check. You can use a simple image like ‘busybox’ and install ‘curl’ in the ‘initContainer’ to perform the health check.
– The ‘command’ for the ‘initcontainer’ should run a ‘while’ loop that keeps checking the database service’s health endpoint until it returns a successful status code.
– You can define the health endpoint in the ‘db-service’ Deployment’s service definition.

2. Update the ‘db-service’ Deployment – Ensure that the ‘db-servjce’ Deployment includes a health cneck endpoint in its service definition. – For example, you can expose a health endpoint at ‘http://db-service:5432/health’ in your database service’s configuration. – The health endpoint should return a successful status code (e.g., 200) if the database is running and ready. – If the database is not reachable, the endpoint should return an error code.

3. Apply the changes: – Apply the updated ‘web-app’ and ‘db-service’ Deployment YAML files to your Kubernetes cluster using ‘kubectl apply’ 4. Verify the implementation: – Once the Deployment iS updated, verity that the ‘web-app’ pods only start atter the ‘db-service’ pods are ready. – You can observe the ‘initcontainer’ logs tor the ‘db-checker’ container to confirm that the health checks are being performed. – You can also monitor the ‘db-service’ pods to ensure they are in a ‘Running’ state. This setup will ensure that the ‘web-app’ containers will not start until the ‘db-service’ is reachable and healthy. This ensures that the web application has access to the database and can function properly.,

Q61. You are developing a service that uses a custom configuration file called ‘service.properties’. You want to use ConfigMaps to store and manage this file in a secure and efficient manner. The ‘service-properties’ file contains sensitive information such as database credentials and API keys.
How would you create a ConfigMap that securely stores the ‘service-properties’ file, ensuring that the file is accessible only to the service’s container?

Q62. Refer to Exhibit.

Task
A Deployment named backend-deployment in namespace staging runs a web application on port 8081.

Q63. You are building a microservices application on Kubernetes, where two services, and ‘service-b’ , need to communicate with each other securely. ‘Service-b’ needs to expose a secure endpoint that is only accessible by ‘service-a’. Describe how you would implement this using Kubernetes resources, including the configuration for the ‘service-b’ endpoint.

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define a Kubernetes Secret:
– Create a Kubernetes secret to store the certificate and key pair for ‘service-W. This secret will be used to secure the communication.
– Example:

2. Configure ‘service-b’ Deployment: – Define a Deployment for ‘service-b’ , specifying a container that uses the secret for TLS. – Ensure that the container has the required dependencies and configuration to use TLS. – Example:

3. Define a Kubernetes Service for ‘service-b’.’ – Create a Service for ‘service-b’ that exposes the secure endpoint on a specific port (e.g., 8443) and uses the LoadBalancer’ type for external access. – Use the ‘targetPort’ field to specify the container port that ‘service-b’ is listening on. – Example:

4. Configure ‘service-a’ Deployment: – Define a Deployment for ‘service-a’, specifying a container that uses the secret for TLS when connecting to service-W. – Example:

5. Update ‘service-a’ Container Configuration: – Within the ‘service-a’ container, ensure the application is configured to use the certificate and key from the mounted volume (‘Ivar/tls/’) for secure communication with ‘service-b’. 6. Verify Secure Communication: – Use ‘kubectl get pods’ to check the status of both ‘service-a’ and ‘service-W pods. – Test the communication between ‘service-a’ and ‘service-b’ by sending requests from the ‘service-a’ pod to the secure endpoint of ‘service-b’. – Verify that the communication is secure and that ‘service-a’ can successfully access the endpoint. Notes: – You may need to adjust the port numbers and image names in the examples to match your specific setup. – Make sure you have the certificate and key in the correct format and base64 encoded before creating the Secret. – You can also use other methods like a Service Account and Role-Based Access Control (RBAC) to restrict access to the secure endpoint, if needed. – This is a simplified example and additional security measures may be required based on your application’s requirements. ,

Q64. Refer to Exhibit.

Task:
A pod within the Deployment named buffale-deployment and in namespace gorilla is logging errors.
1) Look at the logs identify errors messages.
Find errors, including User “system:serviceaccount:gorilla:default” cannot list resource “deployment” […] in the namespace “gorilla”
2) Update the Deployment buffalo-deployment to resolve the errors in the logs of the Pod.
The buffalo-deployment ‘S manifest can be found at -/prompt/escargot/buffalo-deployment.yaml

Q65. Exhibit:

Context
As a Kubernetes application developer you will often find yourself needing to update a running application.
Task
Please complete the following:
* Update the app deployment in the kdpd00202 namespace with a maxSurge of 5% and a maxUnavailable of 2%
* Perform a rolling update of the web1 deployment, changing the Ifccncf/ngmx image version to 1.13
* Roll back the app deployment to the previous version

Solution:

Q66.

Task
A deployment is falling on the cluster due to an incorrect image being specified. Locate the deployment, and fix the problem.

Q67. You have a Kubernetes deployment tnat uses a ConfigMap to provide configuration settings to your application. You need to update tne ConfigMap with new settings without restarting the deployment.

Q68. 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

The CKAD certification exam is an ideal certification for developers who are looking to advance their careers in the field of cloud-native application development. Linux Foundation Certified Kubernetes Application Developer Exam certification exam is designed to help developers demonstrate their skills and knowledge of Kubernetes and to stand out from the crowd in a competitive job market. Linux Foundation Certified Kubernetes Application Developer Exam certification also helps organizations to identify qualified professionals who can help them to build and manage Kubernetes applications.

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