Linux Foundation CKA Exam Sims - Latest CKA Test Report

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Linux Foundation CKA Exam Syllabus Topics:

Section	Weight	Objectives
Cluster Architecture, Installation & Configuration	25%	- Prepare underlying infrastructure for installing a Kubernetes cluster - Understand CRDs, install and configure operators - Create and manage Kubernetes clusters using kubeadm - Use Helm and Kustomize to install cluster components - Manage the lifecycle of Kubernetes clusters - Understand extension interfaces (CNI, CSI, CRI, etc.) - Implement and configure a highly-available control plane - Manage role based access control (RBAC)
Storage	10%	- Understand volume mode, access modes and reclaim policies - Understand Storage Classes and Persistent Volumes - Understand persistent volume claims primitive - Understand how to configure applications with persistent storage
Services & Networking	20%	- Define and enforce Network Policies - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Use the Gateway API to manage Ingress traffic - Understand and use CoreDNS - Know how to use Ingress controllers and Ingress resources - Understand connectivity between Pods
Troubleshooting	30%	- Understand how to monitor applications - Evaluate cluster and node logging - Manage container stdout & stderr logs - Troubleshoot application failure - Troubleshoot cluster component failure - Troubleshoot networking
Workloads & Scheduling	15%	- Understand resource limits and requests - Understand Static Pods - Understand Deployments and rolling update/rollback - Use ConfigMaps and Secrets to configure applications - Understand DaemonSets - Use label selectors to schedule Pods - Understand how to run multiple schedulers and configure scheduler policies - Understand how scheduler works

>> Linux Foundation CKA Exam Sims <<

CKA Exam Sims and Linux Foundation Latest CKA Test Report: Certified Kubernetes Administrator (CKA) Program Exam Finally Passed

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q56-Q61):

NEW QUESTION # 56
Create a busybox pod which executes this command sleep 3600 with the service account admin and verify

A. kubectl run busybox --image=busybox --restart=Always --dry-run
-o yaml -- /bin/sh -c "sleep 3600" > busybox.yml
// Edit busybox.yaml file
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: busybox
name: busybox
spec:
serviceAccountName: admin
containers:
- args:
- /bin/sh
- -c
- sleep 3800
image: busybox
name: busybox
restartPolicy: Always
// verify
K kubectl describe po busybox
B. kubectl run busybox --image=busybox --restart=Always --dry-run
-o yaml -- /bin/sh -c "sleep 3600" > busybox.yml
// Edit busybox.yaml file
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: busybox
name: busybox
spec:
serviceAccountName: admin
containers:
- args:
- /bin/sh
- -c
- sleep 3600
image: busybox
name: busybox
restartPolicy: Always
// verify
K kubectl describe po busybox

Answer: B

NEW QUESTION # 57
You are running a Deployment named 'web-app' with 3 replicas of a web application container. The container image is hosted in a private registry accessible via a secret named 'my-registry-secret'. You need to implement a rolling update strategy that allows for a maximum of one pod to be unavailable at any given time during the update process. Additionally, you need to configure a 'pre-stop' hook for the container that gracefully shuts down the web application before it is terminated.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Update the 'replicas' to 3.
- Define 'maxUnavailable: 1' and 'maxSurge: 0' in the 'strategy.rollingUpdate' section to control the rolling update process.
- Configure a 'strategy.type' to 'RollingUpdate' to trigger a rolling update when the deployment is updated.
- Add a Always' to ensure that the new image is pulled
even if it exists in the pod's local cache.
- Add a hook to define a script that gracefully shuts down
the web application before the pod is terminated.

2. Create the Deployment: - Apply the updated YAML file using 'kubectl apply -f web-app.yamP 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments web-app' to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'my-private-registry/web-app:latest' private registry. 5. Monitor the Deployment: - Use "kubectl get pods -l app=web-app' to monitor the pod updates during the rolling update process. You will observe that one pod is terminated at a time, while one new pod with the updated image is created. 6. Check for Successful Update: - Once the deployment is complete, use 'kubectl describe deployment web-app' to see that the 'updatedReplicas' field matches the 'replicas' field, indicating a successful update.

NEW QUESTION # 58
Given a partially-functioning Kubernetes cluster, identify symptoms of failure on the cluster.
Determine the node, the failing service, and take actions to bring up the failed service and restore the health of the cluster. Ensure that any changes are made permanently.
You can ssh to the relevant I nodes (bk8s-master-0 or bk8s-node-0) using:
[student@node-1] $ ssh <nodename>
You can assume elevated privileges on any node in the cluster with the following command:
[student@nodename] $ | sudo -i

Answer:

Explanation:
See the solution below.
Explanation
solution

NEW QUESTION # 59
Create a file called "config.txt" with two values key1=value1
and key2=value2. Then create a configmap named "keyvalcfgmap" andread data from the file "config.txt" and verify that configmap is created correctly

A. cat >> config.txt << EOF
key1=value1
key2=value2
EOF
kubectl create cm keyvalcfgmap --from-file=config.txt
//Verify
kubectl get cm keyvalcfgmap -o yaml
B. cat >> config.txt << EOF
key1=value1
key2=value2
EOF
cat config.txt
// Create configmap from "config.txt" file
kubectl create cm keyvalcfgmap --from-file=config.txt
//Verify
kubectl get cm keyvalcfgmap -o yaml

Answer: B

NEW QUESTION # 60
Fix a node that shows as non-ready

A. Kubectl get nodes
// Check which node shows a not ready
kubectl describe nodes "node-name"
// Login to the node which shows as not ready and check the
process for kubelet, docker , kube-proxy.
// systemctl status kubelet (or) ps -aux | grep -i "processname"
// If the process is not started, then start using
systemctl start kubelet / docker
// Verify
ps -auxxww | grep -i "process-name"
kubectl get nodes
B. Kubectl get nodes
// Check which node shows a not ready
kubectl describe nodes "node-name"
// Login to the node which shows as not ready and check the
systemctl start kubelet / docker
// Verify
ps -auxxww | grep -i "process-name"
kubectl get nodes

Answer: A

NEW QUESTION # 61
......

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