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How to Register the CNCF CKA Certification Exam

Registration:

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.
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.

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q52-Q57):

NEW QUESTION # 52
What is the maximum number of samples that can be submitted to WildFire manually per day?

A. 1,000
B. 2,000
C. 5,000
D. 15,000

Answer: A

NEW QUESTION # 53
You have a Deployment named 'web-app' running 3 replicas of a web server. You need to define a PodDisruptionBudget (PDB) that ensures at least 2 replicas of the 'web-app' are always available during a planned or unplanned disruption. Write the YAML definition for the PDB and explain how it helps to ensure availability.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. PDB YAML Definition:

2. Explanation: - 'apiVersion: policy/vl Specifies the API version for the PodDisruptionBudget resource. - 'kind: PodDisruptionBudget': Specifies the type of resource, which is a PodDisruptionBudget. - 'metadata.name: web-app-pdb': Sets the name of the PDB. - 'spec.selector.matchLabels: app: web-app': This selector targets the Pods labeled with 'app: web-app' , ensuring the PDB applies to the 'web-app' Deployment's Pods. - 'spec.minAvailable: 2: Specifies the minimum number of Pods (replicas) that must remain available during a disruption. In this case, at least 2 replicas of 'web-app' must be running. 3. How it ensures availability: - Planned Disruptions: If you need to perform a maintenance operation that requires taking down a Pod, the Kubernetes scheduler will not allow it if doing so would violate the PDB. For example, if you try to delete a Pod belonging to 'web-app' , the scheduler will prevent it because deleting it would reduce the available replicas below the 'minAvailable' threshold. - Unplanned Disruptions: In case of node failures, the PDB helps to protect the application by ensuring that the minimum required number of Pods remain running on other healthy nodes. 4. Implementation: - Apply the YAML using 'kubectl apply -f web-app-pdb.yamr 5. Verification: You can verify the PDB's effectiveness by trying to delete Pods or simulate a node failure. You should observe that the scheduler prevents actions that would violate the 'minAvailable' constraint.

NEW QUESTION # 54
Given a partially-functioningKubernetes cluster, identifysymptoms of failure on the cluster.
Determine the node, the failingservice, and take actions to bring upthe failed service and restore thehealth of the cluster. Ensure that anychanges are made permanently.
You cansshto the relevant Inodes (bk8s-master-0orbk8s-node-0) using:
[student@node-1] $ ssh<nodename>
You can assume elevatedprivileges on any node in thecluster with the followingcommand:
[student@nodename] $ | sudo -i

Answer:

Explanation:
See the solution below.
Explanation
solution

NEW QUESTION # 55
You are tasked with securing a Kubernetes cluster by implementing RBAC. Your cluster has two namespaces: 'dev' and 'prod'. You need to create a role that allows users in the 'dev' namespace to create, delete, and list deployments, but only read-only access to deployments in the 'prod' namespace. Additionally, these users should have access to create and manage ConfigMaps within both namespaces.
Create the necessary RBAC resources (Role, RoleBinding) to implement this access control policy.

Answer:

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

Step 2: Create a Role for the 'prod' namespace.

Step 3: Create a RoleBinding in the 'dev' namespace.

Step 4: Create a RoleBinding in the 'prod' namespace.

Step 5: Apply the YAML files to the cluster.

Now, the 'dev-user' can create, delete, and list deployments within the 'dev' namespace. They can only view deployments in the 'prod' namespace. They can also create and manage ConfigMaps in both namespaces.

NEW QUESTION # 56
Score: 4%

Task
Scale the deployment presentation

Answer:

Explanation:
See the solution below.
Explanation
Solution:
kubectl get deployment
kubectl scale deployment.apps/presentation --replicas=6

NEW QUESTION # 57
......

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