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Linux Foundation CKA Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Workloads & Scheduling	15%	- Configure applications with ConfigMaps and Secrets - Pod scheduling: node selector, affinity, taints/tolerations - Resource requests, limits and autoscaling - Deployments, rolling updates and rollbacks - Pod lifecycle, init containers, probes
Topic 2: Storage	10%	- StatefulSet storage configuration - Volume types and access modes - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StorageClasses and dynamic provisioning
Topic 3: Services & Networking	20%	- Ingress resources and controllers - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - Network policies - CNI configuration and troubleshooting - CoreDNS and service discovery
Topic 4: Cluster Architecture, Installation & Configuration	25%	- Install components via Helm / Kustomize - Work with CRDs and Operators - Prepare infrastructure for cluster installation - Create and manage clusters with kubeadm - Manage RBAC - Implement high availability control plane - Manage cluster lifecycle and upgrades - Understand CNI, CSI, CRI interfaces
Topic 5: Troubleshooting	30%	- Control plane component failures - Pod and application failures - Log collection and analysis - Worker node issues and recovery - Network connectivity and DNS resolution problems - Cluster component health checks

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q14-Q19):

NEW QUESTION # 14
Create a deployment as follows:
* Name: nginx-random
* Exposed via a service nginx-random
* Ensure that the service & pod are accessible via their respective DNS records
* The container(s) within any pod(s) running as a part of this deployment should use the nginx Image Next, use the utility nslookup to look up the DNS records of the service & pod and write the output to
/opt/KUNW00601/service.dns and /opt/KUNW00601/pod.dns respectively.

Answer:

Explanation:
See the solution below.
Explanation
Solution:

NEW QUESTION # 15
You have a Deployment running on a Kubernetes cluster with limited resources. How can you adjust the Deployment to use resources more efficiently and prevent resource contention?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Resource Requests and Limits:
- Set 'requests' and 'limits' for CPU and memory for the containers in the Deployment.
- This helps in specifying the minimum resources required by the pods and the maximum resources that they can consume.

2. Optimize Container Images: - Use smaller and more efficient container images to reduce the resource footprint of the pods. 3. Use Resource Quotas: - Apply resource quotas at the namespace level to control the resource consumption of the pods within a namespace. 4. Consider Pod Disruption Budgets (PDB): - Implement PDBs to control the maximum number of pods that can be unavailable during a rolling update or pod deletion. - This ensures that the application remains available during resource-intensive events. 5. Utilize Node Affinity and Tolerations: - Configure node affinity and tolerations to schedule pods on specific nodes that have the required resources. 6. Monitor Resource Utilization: - Regularly monitor the resource utilization of the cluster and the pods. - Use tools like 'kubectl top pods', 'kubectl top nodes', and 'kubectl describe nodes' to gather resource utilization data. - Adjust resource requests and limits accordingly based on the monitoring data.

NEW QUESTION # 16
Create a hostPath PersistentVolume named task-pv-volume with storage 10Gi, access modes ReadWriteOnce, storageClassName manual, and volume at /mnt/data and verify

A. vim task-pv-volume.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: task-pv-volume
labels:
type: local
spec:
storageClassName: ""
capacity:
storage: 5Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
kubectl apply -f task-pv-volume.yaml
//Verify
kubectl get pv
NAME CAPACITY ACCESS
MODES RECLAIM POLICY STATUS CLAIM
STORAGECLASS REASON AGE
task-pv-volume 5Gi RWO
Retain Available
3s
B. vim task-pv-volume.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: task-pv-volume
labels:
type: local
spec:
storageClassName: ""
capacity:
storage: 5Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
kubectl apply -f task-pv-volume.yaml
//Verify
kubectl get pv
NAME CAPACITY ACCESS
MODES RECLAIM POLICY STATUS CLAIM
STORAGECLASS REASON AGE
task-pv-volume 4Gi RWO
Retain Available
8s

Answer: A

NEW QUESTION # 17
Get the DNS records for the service and pods for the deployment redis and the put the value in /tmp/dnsrecordpod and /tmp/dnsrecord-service

A. // Get Pod Ip
kubectl get po -o wide
// Get Service Name
kubectl get svc
// Create a temporary pod and execute nslookup command
Note: POD IP format should be a-b-c-d and not a.b.c.d
kubectl run busybox --image=busybox:1.28 --restart=Never -
-rm -it -- nslookup 192-168-0-69.default.pod >
/tmp/dnsrecord-pod
kubectl run busybox1 --image=busybox:1.26 --restart=Never
--rm -it -- nslookup redis-service > /tmp/dnsrecordservice
//Verify
cat /tmp/dnsrecord-pod
Server: 10.2.8.10
Address 1: 10.2.0.10 kube-dns.kube system.svc.cluster.local Name: 192-168-0-69.default.pod Address 1: 192.168.0.69 192-166-0-69.redis service.default.svc.cluster.local cat /tmp/dnsrecord-pod Server: 10.2.0.10 Address 1: 10.2.0.10 kube-dns.kube system.svc.cluster.local Name: 192-168-0-69.default.pod Address 1: 192.168.0.69 192-168-0-69.redis service.default.svc.cluster.local
B. // Get Pod Ip
kubectl get po -o wide
// Get Service Name
kubectl get svc
// Create a temporary pod and execute nslookup command
Note: POD IP format should be a-b-c-d and not a.b.c.d
kubectl run busybox --image=busybox:1.28 --restart=Never -
-rm -it -- nslookup 192-168-0-69.default.pod >
/tmp/dnsrecord-pod
kubectl run busybox1 --image=busybox:1.28 --restart=Never
--rm -it -- nslookup redis-service > /tmp/dnsrecordservice
//Verify
cat /tmp/dnsrecord-pod
Server: 10.2.0.10
Address 1: 10.2.0.10 kube-dns.kube system.svc.cluster.local Name: 192-168-0-69.default.pod Address 1: 192.168.0.69 192-168-0-69.redis service.default.svc.cluster.local cat /tmp/dnsrecord-pod Server: 10.2.0.10 Address 1: 10.2.0.10 kube-dns.kube system.svc.cluster.local Name: 192-168-0-69.default.pod Address 1: 192.168.0.69 192-168-0-69.redis service.default.svc.cluster.local

Answer: B

NEW QUESTION # 18
Create a Pod nginx and specify both CPU, memory requests and limits together and verify.

A. kubectl run nginx-request --image=nginx --restart=Always --dryrun -o yaml > nginx-request.yml
// add the resources section and create
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx-request
spec:
containers:
- image: nginx
name: nginx
resources:
requests:
memory: "100Mi"
cpu: "0.5"
limits:
memory: "200Mi"
cpu: "1"
restartPolicy: Always
k kubectl apply -f nginx-request.yaml
// Verify
Kubectl top po
B. kubectl run nginx-request --image=nginx --restart=Always --dryrun -o yaml > nginx-request.yml
// add the resources section and create
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx
resources:
requests:
memory: "100Mi"
cpu: "0.4"
limits:
memory: "200Mi"
cpu: "7"
restartPolicy: Always
k kubectl apply -f nginx-request.yaml
// Verify
Kubectl top po

Answer: A

NEW QUESTION # 19
......

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