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100% Pass Quiz 2025 Useful Linux Foundation CKA: Certified Kubernetes Administrator (CKA) Program Exam Latest Test Sample

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q41-Q46):

NEW QUESTION # 41
You have a Deployment named 'nginx-deployment running an Nginx server. The Nginx configuration file is stored in a ConfigMap named 'nginx-config'. You need to dynamically update the Nginx configuration file without restarting the Nginx pods.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Create the ConfigMap (if not already existing):
- Define a ConfigMap named 'nginx-config' containing the Nginx configuration file. For example, create a file 'nginx.conf with the desired configuration and then create the ConfigMap using 'kubectl create configmap nginx-config --from-file=nginx.conf:
kubectl create configmap nginx-config --from-file=nginx.conf
2. Configure Nginx Deployment:
- Modify the 'nginx-deployment' Deployment to mount the 'nginx-config' ConfigMap as a volume.
- Use 'volumeMounts' to specify where the ConfigMap should be mounted (e.g., '/etc/nginx/conf.d/' ) and 'volumes' to define the ConfigMap as a volume source.
- Update the Nginx container's configuration to use the mounted configuration file (e.g., 'nginx -g daemon off;').

3. Update the ConfigMap: - Modify the 'nginx-config' ConfigMap with the new configuration content. This can be done using 'kubectl patch' or 'kubectl edit': kubectl patch configmap nginx-config -p '{"data": {"nginx.conf": "new_nginx_configuration"}}' 4. Observe Nginx Pods: - Monitor the Nginx pods in the 'nginx-deployment' Deployment. Since the ConfigMap is mounted as a volume, Nginx will automatically reload the configuration file without restarting the pod. 5. Verify the Update: - Use 'kubectl logs' or 'kubectl exec' to examine the Nginx pod's logs and confirm that the new configuration is being used.

NEW QUESTION # 42
Add a taint to node "worker-2" with effect as "NoSchedule" and
list the node with taint effect as "NoSchedule"

A. // Add taint to node "worker-2"
kubectl taint nodes worker-2 key=value:NoSchedule
.items[*]}{.metadata.name} {.spec.taints[?(
@.effect=='NoSchedule' )].effect}{" "}{end}" | awk 'NF==2
{print $0}'
B. // Add taint to node "worker-2"
kubectl taint nodes worker-2 key=value:NoSchedule
// Verify
// Using "custom-coloumns" , you can customize which coloumn to
be printed
kubectl get nodes -o customcolumns=NAME:.metadata.name,TAINTS:.spec.taints --no-headers
// Using jsonpath
kubectl get nodes -o jsonpath="{range
.items[*]}{.metadata.name} {.spec.taints[?(
@.effect=='NoSchedule' )].effect}{" "}{end}" | awk 'NF==2
{print $0}'

Answer: B

NEW QUESTION # 43
Configure the kubelet systemd- managed service, on the node labelled with name=wk8s-node-1, to launch a pod containing a single container of Image httpd named webtool automatically. Any spec files required should be placed in the /etc/kubernetes/manifests directory on the node.
You can ssh to the appropriate node using:
[student@node-1] $ ssh wk8s-node-1
You can assume elevated privileges on the node with the following command:
[student@wk8s-node-1] $ | sudo -i

Answer:

Explanation:
solution

NEW QUESTION # 44
Print all pod name and all image name and write it to a file
name "/opt/pod-details.txt"

Answer:

Explanation:
kubectl get pods -o=custom-columns='Pod Name:metadata.name','Image:spec.containers[*].image' > /opt/pod-details.txt

NEW QUESTION # 45
Score: 13%

Task
A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.

Answer:

Explanation:
See the solution below.
Explanation
Solution:
sudo -i
systemctl status kubelet
systemctl start kubelet
systemctl enable kubelet

NEW QUESTION # 46
......

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