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The Linux Foundation Certified Kubernetes Application Developer Exam (CKAD) prep material is available in three versions. CKAD Practice exams and PDF questions are available at Actual4Dumps so that users can meet their training needs and pass the Linux Foundation Certified Kubernetes Application Developer Exam (CKAD) exam on the first try. The philosophy of Actual4Dumps behind offering Linux Foundation Certified Kubernetes Application Developer Exam (CKAD) prep material in three formats is helping students meet their unique learning needs.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Deployment | 20% | - Use Helm package manager - Manage Deployments, rolling updates and rollbacks - Work with Kustomize - Implement deployment strategies |
| Topic 2: Application Design and Build | 20% | - Understand multi-container Pod design patterns - Define, build and modify container images - Choose and use appropriate workload resources - Utilize persistent and ephemeral volumes |
| Topic 3: Application Environment, Configuration and Security | 25% | - Work with ConfigMaps - Understand authentication, authorization and admission control - Create and consume Secrets - Configure resource requirements, limits and quotas - Apply application security settings - Use ServiceAccounts - Use custom resources and extensions |
| Topic 4: Application Observability and Maintenance | 15% | - Understand API deprecations - Implement probes and health checks - Work with container logs - Monitor applications using CLI tools - Debug applications in Kubernetes |
| Topic 5: Services and Networking | 20% | - Use Ingress rules - Expose applications via Services - Understand and apply NetworkPolicies - Troubleshoot network access |
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NEW QUESTION # 129 
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:
See the solution below.
Explanation
Solution:
NEW QUESTION # 130
You are deploying a microservice application that requires secure access to an external database. The database credentials are stored as environment variables Within the application container. You want to create a Kubernetes secret that securely stores these credentials and can be mounted as a file in the container.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Kubernetes Secret:
- Create a YAML file, for example, 'database-secret.yamr , with the following content:
- Replace ". ". ". and with the actual values, Base64 encoded. You can use the 'base64' command to encode the values: bash echo "your _ username" | base64 echo 'Your_password" | base64 echo "your _ host" | base64 echo "your _ port" | base64 2. Apply the Secret: - Apply the secret to your Kubernetes cluster: bash kubectl apply -f database-secret.yaml 3. Modify the Deployment: - Modify your Deployment YAML file to mount the secret as a file:
4. Apply the Updated Deployment: - Apply the updated Deployment YAML file using: bash kubectl apply -f my-microservice-deployment.yaml 5. Accessing Credentials: - The application container can now access the environment variables from the secret using 'process-env-DATABASE USER , 'process.env.DATABASE_PASSWORD', etc. Additionally, the secret data is mounted as a file at '/var/secrets/database'.
NEW QUESTION # 131
You are developing a new microservice that requires access to a database deployed in a different namespace. You want to configure a ServiceAccount and RoleBinding to provide the necessary permissions for the microservice to connect to the database.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ServiceAccount:
- Create a ServiceAccount in the namespace where our microservice is deployed:
2. Create a Role: - Create a Role in the namespace where the database is deployed, granting access to the database resources:
3. Create a ROIeBinding: - Create a RoleBinding in the database namespace to bind the Role to the ServiceAccount:
4. Apply the Configuration: - Apply the created ServiceAccount, Role, and Roledinding using 'kubectl apply -r commands: bash kubectl apply -f my-microservice-sa_yaml kubectl apply -f my-database-access-role-yaml kubectl apply -f my-database-access-rolebinding.yaml 5. Configure the Microservice: - Mount the ServiceAccount token as a secret within the microservice's pod:
6. Verify Permissions: - Access the database from the microservice pod to verify that the required permissions are granted.
NEW QUESTION # 132
Exhibit:
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: A
NEW QUESTION # 133
You have a ConfigMap named 'database-config' tnat stores sensitive information for connecting to a database. You want to ensure that this ConfigMap is only accessible by a specific namespace and not by other namespaces in the cluster.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Namespace:
bash
kubectl create namespace my-database-namespace
2. Move the ConfigMap to the Namespace:
bash
kubectl move configmap database-config -n my-database-namespace
3. Configure Role-Based Access Control (RBAC):
- Create a Role:
- Create a RoleBinding:
- Replace 'my-service-account with the actual name of the service account that needs access to the ConfigMap. 4. Apply the Role and Role3inding: bash kubectl apply -f database-config-reader.yaml kubectl apply -f database-config-reader-binding.yaml 5. Verify Access: - From the 'my-database-namespace': bash kubectl get configmap database-config -n my-database-namespace The command should succeed as the service account in this namespace has the necessary permissions. - From a different namespace: bash kubectl get configmap database-config -n another-namespace This command should fail as the service account in this namespace does not have access to the ConfigMap. This solution uses RBAC to restrict access to the ConfigMap to only the service account in the 'my-database-namespace'. This ensures that sensitive information is only accessible by authorized entities within the cluster,
NEW QUESTION # 134
......
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