Linux Foundation New 2025 CKAD Sample Questions Reliable CKAD Test Engine [Q12-Q34]

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Linux Foundation New 2025 CKAD Sample Questions Reliable CKAD Test Engine

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What are containers?

Containers are like self-contained environments that run on Linux servers. They are independent, and they can run services, applications, and other software inside them. Containers can act as an application repository. Cloud providers can put them together quickly and deploy them anywhere, so it is easier to scale. Containers are isolated from the host machine, so it’s harder for attackers to break into them. Containers are fast because they don’t have to compile the operating system. Guide containers that run on the master node, and then deploy them to the workers. You can create a new container in your Kubernetes console, or get it from a registry. Android applications are containers, and so are web applications. Helps cloud providers save on resources. Cover different environments, including testing and production. Containers run the same application on different operating systems, so testing is easy. Run applications on the fly without installing them. Containers are more portable if they are detached from the VMs or cloud instances. Data is safe, and it can be encrypted. You can also protect data by encrypting the containers themselves. CNCF CKAD Dumps are enough to complete your preparation with ease and confidence.

Documentation is always up to date thanks to Travis. Isolates applications inside containers so they can be moved around and launched on different virtual machines. This helps to improve security. Made for running clustered applications. Paste a Dockerfile to a local directory and follow the instructions. Adapt to all programming language dependencies. Kubernetes was built to work with JSON, so you don’t need to do any extra integration. The dependency will always be the same, which is very important for your application. Unique because it is focused on applications. Kubernetes is not the only popular container management system. Sector containers.

Linux Foundation CKAD Certification Exam is a valuable credential for professionals in the application development industry. CKAD exam tests the practical skills of candidates in developing and deploying applications on Kubernetes clusters, and the certification is recognized globally by top companies in the IT industry. Candidates can prepare for the exam by taking the Linux Foundation CKAD exam preparation course, which covers all the topics and skills required to pass the exam. Linux Foundation Certified Kubernetes Application Developer Exam certification provides career advancement opportunities and is valid for two years, with the option to renew it by passing a renewal exam or earning CEUs.

Q12. You need to create a container image for an application that uses a specific version of Node.js (v16.x). How would you define this version within your Dockerfile to ensure the application runs as expected in a Kubernetes cluster?

Q13. Context

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

Q14. 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?

Q15. You have a web application that requires a specific sidecar container to perform certain tasks like logging and monitoring. You need to ensure that this sidecar container iS always running alongside your application pod, even it the main application pod restarts or iS deleted and recreated. How would you achieve this using a DaemonSet in Kubernetes?

Q16. Context

Context
Developers occasionally need to submit pods that run periodically.
Task
Follow the steps below to create a pod that will start at a predetermined time and]which runs to completion only once each time it is started:
* Create a YAML formatted Kubernetes manifest /opt/KDPD00301/periodic.yaml that runs the following shell command: date in a single busybox container. The command should run every minute and must complete within 22 seconds or be terminated oy Kubernetes. The Cronjob namp and container name should both be hello
* Create the resource in the above manifest and verify that the job executes successfully at least once

Q17. You are tasked with deploying a stateful application, a distributed database, that requires persistent storage and consistent ordering of pods. The application’s pods need to communicate With each other using a specific port (5432). How would you configure a StatefulSet to achieve this?

Q18. Context

Context
Your application’s namespace requires a specific service account to be used.
Task
Update the app-a deployment in the production namespace to run as the restrictedservice service account. The service account has already been created.

Q19. You are deploying a resource-intensive application that requires a large amount of memory and CPU. How would you create a ResourceQuota to limit the resources consumed by this application and prevent it from impacting other workloads in the cluster?

Q20. You are running a Kubernetes cluster that manages a critical web application. Your application uses a custom resource called ‘Database’ to represent database instances. You want to ensure that only authorized users within your organization can create and manage these database instances. How would you implement this using ServiceAccounts and Role-Based Access Control (RBAC)?

Q21. You are managing a Kubernetes cluster that runs several microservices. One of these services, called “web-app”, needs to have its pods scaled based on the current load. You have created a custom resource called “autoscaling.k8s.i0/v1 alphal” which represents the desired number of replicas for the “web-app” service- Implement a Kubernetes Controller that watches for changes in this custom resource and automatically scales the “web-app” Deployment accordingly.

Q22. You have a container image that uses a specific version of a library. You want to update this library to a newer version while still keeping the previous version available for compatibility purposes. Describe the steps involved in modifying the container image to include both versions of the library without rebuilding the entire application.

Q23. You are deploying a sensitive application that requires strong security measures. You need to implement a solution to prevent unauthorized access to the container’s runtime environment. How would you use Seccomp profiles to enforce security policies at the container level?

Q24. Refer to Exhibit.

Task
You are required to create a pod that requests a certain amount of CPU and memory, so it gets scheduled to-a node that has those resources available.
* Create a pod named nginx-resources in the pod-resources namespace that requests a minimum of 200m CPU and 1Gi memory for its container
* The pod should use the nginx image
* The pod-resources namespace has already been created

Q25.

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

Q26. You have a container image that contains a Python application. The application depends on specific libraries that are not included in the base image used for the container. Describe the steps involved in modifying the image to install the necessary libraries Without rebuilding the entire application.

Q27. Context

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

Q28. You are developing a multi-container application that includes a web server, a database, and a message broker. You want to ensure that the database and message broker start before the web server to avoid dependency issues. How can you design your deployment to achieve this?

Q29. Refer to Exhibit.

Context
Developers occasionally need to submit pods that run periodically.
Task
Follow the steps below to create a pod that will start at a predetermined time and]which runs to completion only once each time it is started:
* Create a YAML formatted Kubernetes manifest /opt/KDPD00301/periodic.yaml that runs the following shell command: date in a single busybox container. The command should run every minute and must complete within 22 seconds or be terminated oy Kubernetes. The Cronjob namp and container name should both be hello
* Create the resource in the above manifest and verify that the job executes successfully at least once

Q30. You are running a critical application in your Kubernetes cluster, and it requires access to sensitive information stored in a secret To ensure the application only accesses the specific data it needs and avoids potential misuse, you need to configure ServiceAccounts With proper permissions to access the secret. Describe the steps involved in creating a ServiceAccount with the least privilege principle to access the secret Additionally, mention the YAML configuration required for the ServiceAccount and Role.

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Secret:
– Create a secret to store your sensitive data using ‘kubectl create secret generic my-secret -from
– This command creates a secret named ‘my-secret’ with two key-value pairs: ‘username’ and ‘password’
– Replace the values with your actual sensitive data.
2. Create a ServiceAccount
– Create a ServiceAccount using ‘kubectl create serviceaccount my-service-account
– This command creates a ServiceAccount named ‘my-service-account’
3. Create a Role:
– Create a Role to define the permissions for the ServiceAccount. This role will grant access to the secret.
– Create a Role named ‘my-role’ using the following YAML:

– Save this configuration in a file named ‘my-role.yamr and apply it to your cluster using ‘kubectl apply -f my-role-yamp – Replace ‘default’ With the namespace where your secret is created. 4. Bind the Role to the ServiceAccount: – Bind the created Role to the ServiceAccount using ‘kubectl create rolebinding my-role-binding -role-my-role account’. – This command creates a RoleBinding named ‘my-role-binding’ which binds the ‘my-role’ to the ‘my-service-account’ in the ‘default’ namespace. – Replace ‘default’ With the namespace where your secret is created. 5. Verify Permissions: – You can verify the ServiceAccount’s access to the secret using ‘kubectl auth can-i get secrets -as-my-service-account –namespace=default’ – This command should return ‘yes’ if the ServiceAccount has the necessary permissions. 6. Use the ServiceAccount in your Pod: – Use the ServiceAccount within your Pod’s specification to grant the application access to the secret. – Add a ‘serviceAccountNames field Within your Pod specification pointing to tne created ServiceAccount.

Now your application running in the Pod will have access to the secret ‘my-secret using the environment variables defined in the ‘envFror-n’ section. The ServiceAccount ‘my-service-account is configured with the least privilege principle, ensuring that it can only access the necessary data. ,

Q31. You are tasked With setting up a Kubernetes cluster With a service that exposes a web application, along with a database running as a stateful set The application needs to access the database through an internal IP address, but the database should not be accessible from outside the cluster. What are the steps involved to configure this, and what components should be used to achieve this setup?

Q32. You have a Deployment named ‘mysql-deployment running a MySQL database container. The ‘mysql-deployment’ has 2 replicas and you want to implement a blue-green deployment strategy for updating the database. The following steps need to be implemented:
– Create a new Deployment called ‘mysql-deployment-new’ with the updated MySQL image.
– Ensure that both deployments (old and new) are running concurrently.
– Route traffic to the ‘mysql-deployment-new’ deployment.
– Remove the old deployment (‘mysql-deployment) once the traffic is switched over.

Q33. 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.

Q34. Refer to Exhibit.

Given a container that writes a log file in format A and a container that converts log files from format A to format B, create a deployment that runs both containers such that the log files from the first container are converted by the second container, emitting logs in format B.
Task:
* Create a deployment named deployment-xyz in the default namespace, that:
* Includes a primary
lfccncf/busybox:1 container, named logger-dev
* includes a sidecar Ifccncf/fluentd:v0.12 container, named adapter-zen
* Mounts a shared volume /tmp/log on both containers, which does not persist when the pod is deleted
* Instructs the logger-dev
container to run the command

which should output logs to /tmp/log/input.log in plain text format, with example values:

* The adapter-zen sidecar container should read /tmp/log/input.log and output the data to /tmp/log/output.* in Fluentd JSON format. Note that no knowledge of Fluentd is required to complete this task: all you will need to achieve this is to create the ConfigMap from the spec file provided at /opt/KDMC00102/fluentd-configma p.yaml , and mount that ConfigMap to /fluentd/etc in the adapter-zen sidecar container