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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q69-Q74):

NEW QUESTION # 69
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000056
Task
Review and apply the appropriate NetworkPolicy from the provided YAML samples.
Ensure that the chosen NetworkPolicy is not overly permissive, but allows communication between the frontend and backend Deployments, which run in the frontend and backend namespaces respectively.
First, analyze the frontend and backend Deployments to determine the specific requirements for the NetworkPolicy that needs to be applied.
Next, examine the NetworkPolicy YAML samples located in the ~/netpol folder.
Failure to comply may result in a reduced score.
Do not delete or modify the provided samples. Only apply one of them.
Finally, apply the NetworkPolicy that enables communication between the frontend and backend Deployments, without being overly permissive.

Answer:

Explanation:
Task Summary
* Connect to host cka000056
* Review existing frontend and backend Deployments
* Choose one correct NetworkPolicy from the ~/netpol directory
* The policy must:
* Allow traffic only from the frontend Deployment to the backend Deployment
* Avoid being overly permissive
* Apply the correct NetworkPolicy without modifying any sample files
Step-by-Step Instructions
Step 1: SSH into the correct node
ssh cka000056
Step 2: Inspect the frontend Deployment
Check the labels used in the frontend Deployment:
kubectl get deployment -n frontend -o yaml
Look under metadata.labels or spec.template.metadata.labels. Note the app or similar label (e.g., app:
frontend).
Step 3: Inspect the backend Deployment
kubectl get deployment -n backend -o yaml
Again, find the labels assigned to the pods (e.g., app: backend).
Step 4: List and review the provided NetworkPolicies
List the available files:
ls ~/netpol
Check the contents of each policy file:
cat ~/netpol/<file-name>.yaml
Look for a policy that:
* Has kind: NetworkPolicy
* Applies to the backend namespace
* Uses a podSelector that matches the backend pods
* Includes an ingress.from rule that references the frontend namespace using a namespaceSelector (and optionally a podSelector)
* Does not allow traffic from all namespaces or all pods
Here's what to look for in a good match:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: allow-frontend-to-backend
namespace: backend
spec:
podSelector:
matchLabels:
app: backend
ingress:
- from:
- namespaceSelector:
matchLabels:
name: frontend
Even better if the policy includes:
- namespaceSelector:
matchLabels:
name: frontend
podSelector:
matchLabels:
app: frontend
This limits access to pods in the frontend namespace with a specific label.
Step 5: Apply the correct NetworkPolicy
Once you've identified the best match, apply it:
kubectl apply -f ~/netpol/<chosen-file>.yaml
Apply only one file. Do not alter or delete any existing sample.
ssh cka000056
kubectl get deployment -n frontend -o yaml
kubectl get deployment -n backend -o yaml
ls ~/netpol
cat ~/netpol/*.yaml # Review carefully
kubectl apply -f ~/netpol/<chosen-file>.yaml
Command Summary
ssh cka000056
kubectl get deployment -n frontend -o yaml
kubectl get deployment -n backend -o yaml
ls ~/netpol
cat ~/netpol/*.yaml # Review carefully
kubectl apply -f ~/netpol/<chosen-file>.yaml

NEW QUESTION # 70
Create an nginx pod and load environment values from the above configmap "keyvalcfgmap" and exec into the pod and verify the environment variables and delete the pod

A. // first run this command to save the pod yaml
kubectl run nginx --image=nginx --restart=Always --dry-run -o
yaml > nginx-pod.yml
// edit the yml to below file and create
vim nginx-pod.yml
apiVersion: v1
name: nginx
envFrom:
- configMapRef:
name: keyvalcfgmap
restartPolicy: Always
kubectl apply -f nginx-pod.yml
// verify
kubectl exec -it nginx -- env
kubectl delete po nginx
B. // first run this command to save the pod yaml
kubectl run nginx --image=nginx --restart=Always --dry-run -o
yaml > nginx-pod.yml
// edit the yml to below file and create
vim nginx-pod.yml
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx
spec:
containers:
- image: nginx
name: nginx
envFrom:
- configMapRef:
name: keyvalcfgmap
restartPolicy: Always
kubectl apply -f nginx-pod.yml
// verify
kubectl exec -it nginx -- env
kubectl delete po nginx

Answer: B

NEW QUESTION # 71
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000022
Task
Reconfigure the existing Deployment front-end in namespace spline-reticulator to expose port 80/tcp of the existing container nginx .
Create a new Service named front-end-svc exposing the container port 80/tcp .
Configure the new Service to also expose the individual Pods via a NodePort .

Answer:

Explanation:
Task Summary
* SSH into cka000022 #
* Modify an existing Deployment:
* Namespace: spline-reticulator
* Deployment: front-end
* Container: nginx
* Expose: port 80/tcp
* Create a Service:
* Name: front-end-svc
* Type: NodePort
* Port: 80 # container port 80
# Step-by-Step Solution
1## SSH into the correct node
ssh cka000022
## Skipping this = zero score
2## Edit the Deployment to expose port 80
kubectl edit deployment front-end -n spline-reticulator
Under containers: # nginx, add this if not present:
ports:
- containerPort: 80
protocol: TCP
# This enables the container to accept traffic on port 80.
3## Create a NodePort Service
Create a file named front-end-svc.yaml:
cat <<EOF > front-end-svc.yaml
apiVersion: v1
kind: Service
metadata:
name: front-end-svc
namespace: spline-reticulator
spec:
type: NodePort
selector:
app: front-end
ports:
- port: 80
targetPort: 80
protocol: TCP
EOF
## Make sure the Deployment has a matching label selector like app: front-end. You can verify with:
kubectl get deployment front-end -n spline-reticulator -o yaml | grep labels -A 2
4## Apply the service
kubectl apply -f front-end-svc.yaml
5## Verify
Check if the service is created and has a NodePort assigned:
kubectl get svc front-end-svc -n spline-reticulator
# You should see something like:
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
front-end-svc NodePort 10.96.0.123 <none> 80:3XXXX/TCP 10s
Where 3XXXX is your automatically assigned NodePort (between 30000-32767).
Final Command Summary
ssh cka000022
kubectl edit deployment front-end -n spline-reticulator
# Add:
# ports:
# - containerPort: 80
cat <<EOF > front-end-svc.yaml
apiVersion: v1
kind: Service
metadata:
name: front-end-svc
namespace: spline-reticulator
spec:
type: NodePort
selector:
app: front-end
ports:
- port: 80
targetPort: 80
protocol: TCP
EOF
kubectl apply -f front-end-svc.yaml
kubectl get svc front-end-svc -n spline-reticulator

NEW QUESTION # 72
Score: 4%

Task
Check to see how many nodes are ready (not including nodes tainted NoSchedule ) and write the number to /opt/KUSC00402/kusc00402.txt.

Answer:

NEW QUESTION # 73
Score:7%

Task
Create a new PersistentVolumeClaim
* Name: pv-volume
* Class: csi-hostpath-sc
* Capacity: 10Mi
Create a new Pod which mounts the PersistentVolumeClaim as a volume:
* Name: web-server
* Image: nginx
* Mount path: /usr/share/nginx/html
Configure the new Pod to have ReadWriteOnce access on the volume.
Finally, using kubectl edit or kubectl patch expand the PersistentVolumeClaim to a capacity of 70Mi and record that change.

Answer:

Explanation:
Solution:
vi pvc.yaml
storageclass pvc
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pv-volume
spec:
accessModes:
- ReadWriteOnce
volumeMode: Filesystem
resources:
requests:
storage: 10Mi
storageClassName: csi-hostpath-sc
# vi pod-pvc.yaml
apiVersion: v1
kind: Pod
metadata:
name: web-server
spec:
containers:
- name: web-server
image: nginx
volumeMounts:
- mountPath: "/usr/share/nginx/html"
name: my-volume
volumes:
- name: my-volume
persistentVolumeClaim:
claimName: pv-volume
# craete
kubectl create -f pod-pvc.yaml
#edit
kubectl edit pvc pv-volume --record

NEW QUESTION # 74
......

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Quiz Professional Linux Foundation - CKA - Certified Kubernetes Administrator (CKA) Program Exam Reliable Exam Price

CKA Latest Exam Discount & CKA Valid Study Questions

Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q69-Q74):

New CKA Reliable Exam Price 100% Pass | Valid CKA Latest Exam Discount: Certified Kubernetes Administrator (CKA) Program Exam

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