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Objective of CNCF CKA Certification Exam

The CNCF Certified Kubernetes Administrator exam tests knowledge on deploying, managing, and troubleshooting applications on Kubernetes clusters. Software engineers will need to understand key concepts of Kubernetes in order to pass the CNCF Certified Kubernetes Administrator exam. Files and containers running on the cluster will be managed by Kubernetes using its object-store. Understand key features of Kubernetes and how it is a paradigm shift in the way software engineers manage containerized applications. Learning about Kubernetes will be crucial for passing the CNCF Certified Kubernetes Administrator exam. Highly recommended to check out the official study guide. Technical manuals and practice questions can be found on the website. Functional knowledge of Kubernetes is crucial for passing the CNCF Certified Kubernetes Administrator exam.

The CKA Exam is a hands-on, performance-based exam that tests an individual’s ability to perform tasks related to Kubernetes administration. CKA exam consists of a set of performance-based tasks that must be completed within a three-hour time limit. CKA exam is designed to test an individual’s ability to perform real-world tasks related to Kubernetes administration.

Linux Foundation Certified Kubernetes Administrator (CKA) program is a globally recognized certification that validates the skills and knowledge of Kubernetes administrators. The CKA exam tests the ability of administrators to design, deploy, configure, and manage Kubernetes clusters. CKA exam covers a wide range of topics that include Kubernetes architecture, installation, configuration, security, troubleshooting, and automation.

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q62-Q67):

NEW QUESTION # 62
You have a Deployment named 'my-app-deployment' running a web application. The Deployment's Service is exposed using a NodePort service. You need to configure a new Ingress resource that allows traffic to reach the web application through a specific domain name. How would you set up the Ingress configuration?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Install the Ingress Controller:
- If you haven't already, install an Ingress controller. Common options include:
- NGINX Ingress Controller: [https://kubernetes.github.io/ingress-nginx/](https://kubernetes.github.io/ingress- nginx/)
- Traefik Ingress Controller: [https://traefik.io[](https://traefik.io/)
2. Create an Ingress Resource:
- Create a new Ingress resource using the following YAML structure, replacing the placeholders with your actual values:

3. Configure DNS: - Create a DNS record for your domain 'my-app.example.com' pointing to the IP address of your Ingress controller. This can be either a LoadBalancer service IP or the Ingress controller's pod IP if you're using NodePort. 4. Verify Ingress Setup: - Once the DNS records are propagated, you should be able to access your web application through the configured domain name 'my-app.example.com'.

NEW QUESTION # 63
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000055
Task
Verify the cert-manager application which has been deployed to your cluster .
Using kubectl, create a list of all cert-manager Custom Resource Definitions (CRDs ) and save it to ~/resources.yaml .
You must use kubectl 's default output format.
Do not set an output format.
Failure to do so will result in a reduced score.
Using kubectl, extract the documentation for the subject specification field of the Certificate Custom Resource and save it to ~/subject.yaml.

Answer:

Explanation:
Task Summary
You need to:
* SSH into the correct node: cka000055
* Use kubectl to list all cert-manager CRDs, and save that list to ~/resources.yaml
* Do not use any output format flags like -o yaml
* Extract the documentation for the spec.subject field of the Certificate custom resource and save it to ~
/subject.yaml
Step-by-Step Instructions
Step 1: SSH into the node
ssh cka000055
Step 2: List cert-manager CRDs and save to a file
First, identify all cert-manager CRDs:
kubectl get crds | grep cert-manager
Then extract them without specifying an output format:
kubectl get crds | grep cert-manager | awk '{print $1}' | xargs kubectl get crd > ~/resources.yaml This saves the default kubectl get output to the required file without formatting flags.
Step 3: Get documentation for spec.subject in the Certificate CRD
Run the following command:
kubectl explain certificate.spec.subject > ~/subject.yaml
This extracts the field documentation and saves it to the specified file.
If you're not sure of the resource, verify it exists:
kubectl get crd certificates.cert-manager.io
Final Command Summary
ssh cka000055
kubectl get crds | grep cert-manager | awk '{print $1}' | xargs kubectl get crd > ~/resources.yaml kubectl explain certificate.spec.subject > ~/subject.yaml

NEW QUESTION # 64
Create a pod named kucc8 with a single app container for each of the following images running inside (there may be between 1 and 4 images specified):
nginx + redis + memcached.

Answer:

Explanation:
solution

NEW QUESTION # 65
You have a Kubernetes cluster with a Deployment named 'web-app' that runs a web application. You need to set up a mechanism to automatically scale the deployment based on the CPU utilization of the pods. The scaling should be triggered when the average CPU utilization across all pods reaches 70%. You should set the minimum and maximum replicas to 2 and 5 respectively.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Horizontal Pod Autoscaler (HPA):
- Use "kubectl create hpa' command to create an HPA resource.
- Specify the name of the HPA, the Deployment to scale, the target CPU utilization (70%), and the minimum and maximum replicas.
kubectl create hpa web-app-hpa --min=2 --max=5 --cpu-utilization-percentage=70 --target- ref=Deployment/web-app
2. Verify the HPA Creation:
- Use 'kubectl get hpa' command to check if the HPA was created successfully. You should see an HPA named 'web-app-hpa' with the configured settings.
3. Monitor the Scaling Behavior:
- You can use the 'kubectl get pods -l command to monitor the number of pods running as the CPU utilization changes.
- When the average CPU utilization across the pods reaches 70%, the HPA will automatically scale up the Deployment to add more pods.
- Conversely, when the CPU utilization falls below the threshold, the HPA will scale down the Deployment to reduce the number of pods.
Ensure that the 'metrics-server' is installed in your cluster to enable CPU utilization monitoring.,

NEW QUESTION # 66
You are working with a team on a Kubernetes project. You need to ensure that your team cann securely access the Kubernetes cluster and manage resources without compromising security. Describe the different types of access control mechanisms available in Kubernetes and provide an example of how to implement Role-Based Access Control (RBAC) using a ServiceAccount.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Kubernetes Access Control Mechanisms:
- RBAC (Role-Based Access Control): This is the most common and recommended mechanism for managing access in Kubernetes. It involves defining roles and assigning them to users or service accounts.
- ABAC (Attribute-Based Access Control): This allows you to control access based on attributes like pod labels, namespaces, or resource types.
- Network Policies: These define network-level access control rules for communication within the cluster.
2. Implementing RBAC with a ServiceAccount:
- Create a ServiceAccount:

- Apply this YAML file to create the ServiceAccount. - Create a Role:

- Apply this YAML file to create a Role that grants access to deployments. - Bind the Role to the ServiceAccount:

- Apply this YAML file to bind the Role to the ServiceAccount. - Verify RBAC Configuration: - Use 'kubectl auth can-i -list --as=my-service-account --namespace=default' to check the permissions granted to the ServiceAccount.

NEW QUESTION # 67
......

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