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Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q29-Q34):

NEW QUESTION # 29
Context
Anytime a team needs to run a container on Kubernetes they will need to define a pod within which to run the container.
Task
Please complete the following:
* Create a YAML formatted pod manifest
/opt/KDPD00101/podl.yml to create a pod named app1 that runs a container named app1cont using image Ifccncf/arg-output with these command line arguments: -lines 56 -F
* Create the pod with the kubect1 command using the YAML file created in the previous step
* When the pod is running display summary data about the pod in JSON format using the kubect1 command and redirect the output to a file named /opt/KDPD00101/out1.json
* All of the files you need to work with have been created, empty, for your convenience

Answer:

Explanation:
See the solution below.
Explanation
Solution:

NEW QUESTION # 30
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.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap:
- Create a ConfigMap that contains the necessary database connection details.
- This includes parameters like host, port, username, password, and database name.
- Example:

2. Mount the ConfigMap: - In your Deployment's 'spec-template-spec-containers' , mount the ConfigMap as a volume. - Example:

3. Access ConfigMap Values: - Within your application's code, use environment variables to access the values from the mounted ConfigMap. - For example, the environment variable 'DB HOST' would be set to the value "database-service" from the ConfigMap. 4. Deploy and Test: - Apply the ConfigMap and Deployment YAML files. - Test the application to confirm that each pod can connect to the same database using the connection details provided by the ConfigMap. 5. Scale the Deployment: - Scale the Deployment horizontally to increase the number of replicas. - Each new pod will automatically inherit the mounted ConfigMap and have access to the same database connection details.

NEW QUESTION # 31
You have a Deployment running a microservice that is responsible for processing user data To ensure the security of this data, you need to implement a NetworkPolicy that restricts network traffic to and from the microservice's pods.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NetworkP01icy:
- Create a NetworkPolicy YAML file to define the traffic rules:

2. Apply the NetworkPolicy: - Apply tne NetworkPoliCY configuration to your Kubernetes cluster: basn kubectl apply -f restrict-microservice-traffic_yaml 3. Test the NetworkPoIicy: - Create a pod in a different namespace or on a different node. - Attempt to connect to the microservice pod from the new pod. - Verity that the connection is blocked as per the defined NetworkPolicy rules.

NEW QUESTION # 32
You have a Kubernetes cluster with a Deployment named 'my-app' that runs a web application. You want to restrict access to this application to only specific users within your organization. How would you use Service Accounts and RBAC to implement this?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create a Service Account:
- Create a new Service Account specifically for your application:

- Apply this YAML file using 'kubectl apply -f my-app-sa.yaml'. 2. Create a Role: - Define a Role that grants specific permissions to the Service Account. For example, you might want to grant read access to the Deployment's secrets:

- Apply this YAML file using 'kubectl apply -f my-app-reader.yaml' 3. Bind the Role to the Service Account: - Create a RoleBinding that associates the 'my-app-reader' Role with the 'my-app-sa' Service Account:

- Apply this YAML file using 'kubectl apply -f my-app-sa-binding.yaml' 4. Update the Deployment: - Update the 'my-app' Deployment to use the new Service Account:

- Apply the updated Deployment configuration using 'kubectl apply -f my-app.yaml'. 5. Verify: - Ensure that pods within the 'my-app' Deployment are running with the correct Service Account. You can use 'kubectl get pods -l app=my-app -o wide' to inspect the pod details. 6. Restricting Access to Specific Users: - To restrict access to the application to specific users within your organization, you would need to: - Configure a more granular Role to grant specific access levels (e.g., read-only, edit, etc.). - Use a Kubernetes authentication provider (such as OAuth2 or OpenID Connect) to authenticate and authorize users. - Bind the Role to the user's identity, ensuring they have the appropriate permissions. Important Note: This example provides a basic setup for RBAC with Service Accounts. In real-world scenarios, you might need to configure more complex RBAC rules to address your specific security requirements and user access control policies.]

NEW QUESTION # 33
Context

Context
It is always useful to look at the resources your applications are consuming in a cluster.
Task
* From the pods running in namespace cpu-stress , write the name only of the pod that is consuming the most CPU to file /opt/KDOBG030l/pod.txt, which has already been created.

Answer:

Explanation:
Solution:

NEW QUESTION # 34
......

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Chris Black Chris Black

Biography

Study Through Online Linux Foundation CKAD Practice Test

Pass Guaranteed 2025 Linux Foundation Authoritative CKAD: Reliable Linux Foundation Certified Kubernetes Application Developer Exam Study Guide

Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q29-Q34):

Free PDF 2025 Linux Foundation CKAD Latest Reliable Study Guide

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