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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Application Developer (CKAD) Exam |
| Exam Number: | CKAD |
| Related Certifications: | Certified Kubernetes Application Developer (CKAD) |
| Exam Format: | Performance-based, Command-line |
| Real Exam Qty: | 15-20 (performance-based tasks) |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Exam Price: | USD 445 |
| Exam Duration: | 120 minutes |
| Passing Score: | 66% |
| Sample Questions: | Linux Foundation CKAD Sample Questions |
| Exam Way: | Online, proctored exam via PSI Secure Browser (performance-based in a command-line environment). |
| Pre Condition: | No mandatory prerequisites, but working knowledge of container runtimes and microservice architecture is recommended. |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-application-developer-ckad/ |
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Linux Foundation offers a variety of training courses and resources to help developers prepare for the CKAD certification exam. These resources include online courses, study guides, practice exams, and hands-on labs. The Linux Foundation also provides a certification exam voucher that can be redeemed for the CKAD Certification Exam. This voucher includes one free retake if the candidate does not pass the exam on the first attempt.
NEW QUESTION # 47
Context
Task
A deployment is falling on the cluster due to an incorrect image being specified. Locate the deployment, and fix the problem.
Answer:
Explanation:
create deploy hello-deploy --image=nginx --dry-run=client -o yaml > hello-deploy.yaml Update deployment image to nginx:1.17.4: kubectl set image deploy/hello-deploy nginx=nginx:1.17.4
NEW QUESTION # 48
You are running a Kubernetes cluster with a limited number of nodes, and you want to deploy a new application that requires a lot of resources. You are concerned about potential resource contention and performance issues with other existing applications. How would you use resource quotas to manage resource usage and prevent potential issues?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Resource Quota:
- Create a new YAML file (e.g., 'resource-quota.yaml') to define your resource quota.
- Specify the name of the resource quota and the namespace where it will be applied.
- Define the resource limits for the quota. For instance, you can set limits for CPU, memory, pods, services, etc.
2. Apply the Resource Quota: - Apply the resource quota to your cluster using the following command: bash kubectl apply -f resource-quota.yaml 3. Verify the Resource Quota: - Use the "kubectl get resourcequota' command to list the applied resource quotas and confirm their status. 4. Deploy Applications with Resource Requests: - When deploying your applications, ensure that you specify resource requests and limits in your Deployment YAML files. - This will help enforce the resource limits defined by your quota.
5. Monitor Resource Usage: - Use monitoring tools (e.g., Prometheus, Grafana) to track resource usage in your namespace and ensure that applications are staying within the resource limits defined by your quota.
NEW QUESTION # 49
You need to configure a Kubernetes deployment to use a secret stored in a different namespace. How can you access the secret in a different namespace, and how can you mount it as a file in your deployment's container?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Ensure Access to the Secret:
- The service account used by your deployment needs to have read access to the secret in the other namespace. This can be done using a Role and RoleBinding. If the service account already has access, skip to step 2.
- Create a role in the secret's namespace:
- Create a RoleBinding in the secret's namespace:
- Apply the Role and RoleBinding using: bash kubectl apply -f role-yaml kubectl apply -f rolebinding.yaml 2. Modify your Deployment - Update your Deployment YAML file to mount the secret as a file, specifying the namespace:
- Replace 'my-secret with the actual name of the secret and 'secret-namespace with the namespace where the secret is stored. 3. Apply the Updated Deployment: - Apply the updated deployment using: bash kubectl apply -f my-deployment.yaml 4. Access Secret Data: - The secret's data is now mounted in the container at the specified 'mountPatm. You can access the secret's data using the mounted file.]
NEW QUESTION # 50
You are running a web application in a Kubernetes cluster. You have a deployment named 'web- app' with two replicas. You need to implement a Network Policy that allows only traffic from pods with the label app: database' to access the 'web-app' deployment on port 8080. You also need to block all other traffic to the 'web-app' deployment.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Network Policy:
- Create a YAML file named 'web-app-network-policy.yamr with the following content:
2. Apply the Network Policy: - Apply the Network Policy to your cluster: bash kubectl apply -f web-app-network-policy.yaml 3. Verify the Network Policy: - Verify that the Network Policy has been applied correctly by listing the Network Policies in your namespace: bash kubectl get networkpolicies -n default # Replace with your namespace You should see the 'web-app-network-policy' listed. 4. Test the Network Policy: - From a pod with the label 'app: database' , try to access the 'web-app' deployment on port 8080. This should be successful. - From any other pod, try to access the 'web-app' deployment on port 8080. This should be blocked. - The 'podSelector' in the Network Policy specifies that it applies to pods with the label 'app: web-app'. - The 'ingress' section defines the allowed incoming traffic. In this case, it allows traffic from pods with the label 'app: database' on port 8080. - The 'egress' section defines the allowed outgoing traffic. In this case, it allows all outgoing traffic except on port 8080. This ensures that only pods with the 'app: database' label can access the 'web-ap$ deployment on port 8080. Note: - You may need to update the 'namespace' in the Network Policy YAML file to match the namespace where your 'web-app' deployment is running. - Make sure that pods with the label 'app: database' are allowed to access the 'web-app' deployment by other means, such as Service or Ingress, if needed.,
NEW QUESTION # 51
Context
An existing web application must be exposed externally.
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh ckad00025
An application externally using the URL external.sterling-bengal.local . Any requests starting with / must be routed to the application web-app.
To test the web application's external reachability, run
[candidate@ckad00025]
$ curl http://external.sterling-bengal.local/
or open this URL in the remote desktop's browser.
Answer:
Explanation:
See the Explanation below for complete solution.
Explanation:
ssh ckad00025
You need to expose the existing app "web-app" externally at:
* Host: external.sterling-bengal.local
* Path: / (and anything starting with /) # route to web-app
In CKAD labs, this is almost always done with an Ingress pointing to the Service web-app.
1) Find where web-app Service lives (namespace + port)
kubectl get svc -A | grep -w web-app
You'll get something like:
<NAMESPACE> web-app ClusterIP ... <PORT>/TCP
Set the namespace:
NS=<NAMESPACE>
Check the service port(s):
kubectl -n $NS get svc web-app -o yaml
Note the service port number (commonly 80).
Also verify it has endpoints (so it actually routes to pods):
kubectl -n $NS get endpoints web-app -o wide
If endpoints are empty, the Service selector doesn't match pods - tell me and I'll give the exact fix. But usually it's fine.
2) Create the Ingress to route / to web-app
Create a manifest (use the service port you saw; I'll assume 80 below):
cat <<'EOF' > web-app-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: web-app-ingress
spec:
rules:
- host: external.sterling-bengal.local
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: web-app
port:
number: 80
EOF
Apply it:
kubectl -n $NS apply -f web-app-ingress.yaml
Verify:
kubectl -n $NS get ingress web-app-ingress
kubectl -n $NS describe ingress web-app-ingress
If your Service port is not 80, change number: 80 to the correct value and re-apply.
3) Test external reachability (as instructed)
Run exactly:
curl
-i http://external.sterling-bengal.local/
If curl still fails (quick checks)
A) Is there an ingress controller running?
kubectl get pods -A | egrep -i 'ingress|nginx'
kubectl get svc -A | egrep -i 'ingress|nginx'
B) Does Ingress show an address?
kubectl -n $NS get ingress web-app-ingress -o wide
C) Do we have endpoints?
kubectl -n $NS get endpoints web-app -o wide
NEW QUESTION # 52
......
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