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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.

How to Register the CNCF CKA Certification Exam

Registration:

Please click “Register” and follow the instructions on-screen to sign up for your preferred exam date and time. To register for the CKA exam, go to CNCF Website.
You will need your examination confirmation within 48 hours of the exam date and time.
CNCF Certification Exams is an online exam. You must take an official CNCF Certification exam to receive a certificate after the examination.
After registration, you will receive a confirmation email with instructions on how to complete your exam registration.

Linux Foundation CKA Exam Syllabus Topics:

Topic
Details

Topic 1

Cluster Architecture, Installation & Configuration: In this questions about role-based access control (RBAC), highly-available Kubernetes cluster, deployment of a Kubernetes cluster, etcd backup, and restore are included.

Topic 2

Storage: It explains storage classes, persistent volumes, volume mode, access modes, persistent volume claims primitive, and reclaim policies for volumes. Furthermore, this topic deals with configuring applications with persistent storage.

Topic 3

Troubleshooting: This topic discusses cluster and node logging, monitoring applications, managing container stdout, and stderr logs. It also deals with troubleshooting application failure, cluster component failure, and networking.

Topic 4

Workloads & Scheduling: Its sub-topics are manifest management and common templating tools, primitives, scaling apps, ConfigMaps, and performing rolling update and rollbacks.

Topic 5

Services & Networking: This topic tests you understandings of host networking configuration, connectivity between Pods, ClusterIP, NodePort, LoadBalancer service types and endpoints. It also explains how to use Ingress controllers and Ingress resources, configure and use CoreDNS. Lastly, it discusses choosing a suitable container network interface plugin.

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q53-Q58):

NEW QUESTION # 53
Create a pod with init container which create a file "test.txt"
in "workdir" directory. Main container should check a file
"test.txt" exists and execute sleep 9999 if the file exists.

A. // create an initial yaml file with this
kubectl run init-cont-pod --image=alpine --restart=Never --dry-run -o
yaml > init-cont-pod.yaml
// edit the yml as below and create it
vim init-cont-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: init-cont-pod
labels:
app: myapp
spec:
volumes:
- name: test-volume
emptyDir: {}
containers:
- name: main-container
image: busybox:1.28
command: ['sh', '-c', 'if [ -f /workdir/test.txt ]; then sleep
9999; fi']
volumeMounts:
- name: test-volume
mountPath: /workdir
initContainers:
- name: init-myservice
image: busybox:1.28
command: ['sh', '-c', "mkdir /workdir; echo >
/workdir/test.txt"]
volumeMounts:
- name: test-volume
mountPath: /workdir
// Create the pod
kubectl apply -f init-cont-pod.yaml
kubectl get pods
// Check Events by doing
kubectl describe po init-cont-pod
Init Containers:
init-myservice:
Container ID:
docker://ebdbf5fad1c95111d9b0e0e2e743c2e347c81b8d4eb5abcccdfe1dd74524
0d4f
Image: busybox:1.28
Image ID: dockerpullable://busybox@sha256:141c253bc4c3fd0a201d32dc1f493bcf3fff003b6df
416dea4f41046e0f37d47
Port: <none>
Host Port: <none>
Command:
sh
-c
mkdir /workdir; echo > /workdir/test.txt
State: Terminated Reason: Completed
B. // create an initial yaml file with this
kubectl run init-cont-pod --image=alpine --restart=Never --dry-run -o
yaml > init-cont-pod.yaml
// edit the yml as below and create it
vim init-cont-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: init-cont-pod
labels:
app: myapp
spec:
volumes:
- name: test-volume
emptyDir: {}
containers:
- name: main-container
image: busybox:1.28
command: ['sh', '-c', 'if [ -f /workdir/test.txt ]; then sleep
9999; fi']
volumeMounts:
image: busybox:1.28
command: ['sh', '-c', "mkdir /workdir; echo >
/workdir/test.txt"]
volumeMounts:
- name: test-volume
mountPath: /workdir
// Create the pod
kubectl apply -f init-cont-pod.yaml
kubectl get pods
// Check Events by doing
kubectl describe po init-cont-pod
Init Containers:
init-myservice:
Container ID:
docker://ebdbf5fad1c95111d9b0e0e2e743c2e347c81b8d4eb5abcccdfe1dd74524
0d4f
Image: busybox:1.28
Image ID: dockerpullable://busybox@sha256:141c253bc4c3fd0a201d32dc1f493bcf3fff003b6df
416dea4f41046e0f37d47
Port: <none>
Host Port: <none>
Command:
sh
-c
mkdir /workdir; echo > /workdir/test.txt
State: Terminated Reason: Completed

Answer: A

NEW QUESTION # 54
You have a Kubernetes cluster running a deployment named 'my-app' that is exposed via a NodePort service. You want to restrict access to the service from specific IP addresses within the cluster. How can you achieve this using a NetworkPolicy?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Create a NetworkPolicy in the namespace where 'my-app' deployment runs.
- Code:

2. Apply the NetworkPolicy: - Apply the NetworkPolicy using 'kubectl apply -f networkpolicy.yamP

NEW QUESTION # 55
You are setting up RBAC for a Kubernetes cluster with three namespaces: "development", "staging", and "production". You need to create a role binding that allows developers in the "development" namespace to create deployments, pods, and services, but only within their own namespace.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 Create a Role for Developers:

2. Create a Role Binding for Developers:

3. Replace 'developer-user' with the actual username of a developer. 4. Repeat steps 1-3 for other namespaces ("staging" and "production") with appropriate resource permissions and user names. 5. Verify the RBAC configuration: - Check that the roles and rolebindings are created successfully using 'kubectl get roles' and 'kubectl get rolebindings'. - Test the permissions by creating a pod, deployment, or service as a developer user in their respective namespaces. 6. If you encounter issues, review the configuration carefully, making sure the namespaces, roles, role bindings, and user names are correct.

NEW QUESTION # 56
Your company has a Kubernetes cluster with a production namespace (prod) where only authorized engineers can access sensitive dat a. You need to implement an RBAC policy that allows only engineers with a specific label ("role: engineer") to read data from a specific secret named "secret-sensitive" in the "prod" namespace. Describe how you would configure RBAC to achieve this.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Define a Role that allows reading the specific secret:

Step 2: Create a RoleBinding to associate the Role with users labeled as "role: engineer":

Step 3: Ensure users have the necessary labels: - Users or service accounts must be assigned the label "role: engineer" to access the secret. - The Role restricts access to the "secret-sensitive" in the "prod" namespace to only "get" requests. - The RoleBinding associates the Role with users who have the label "role: engineer". - This ensures that only authorized engineers can read data from the "secret-sensitive" secret. ,

NEW QUESTION # 57
Create the nginx pod with version 1.17.4 and expose it on port 80

Answer:

Explanation:
kubectl run nginx --image=nginx:1.17.4 --restart=Never -- port=80

NEW QUESTION # 58
......

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