One of the most common questions I receive from aspiring Certified Kubernetes Administrator (CKA) candidates is:
“What should I actually practice before the exam?”
After completing the CKA and spending countless hours working through labs, troubleshooting clusters, and exploring Kubernetes documentation, I realized that passing the exam is less about memorizing commands and more about being comfortable performing common Kubernetes tasks quickly and accurately.
The CKA is a performance-based certification. You are expected to work with real Kubernetes clusters, solve problems, and complete administrative tasks under time pressure.
In this article, I’ve compiled 30 Kubernetes tasks that every CKA candidate should practice before exam day.
Cluster Administration
kubectl cluster-info
kubectl get nodes
Understand the health and status of the cluster.
2. Drain and Uncordon Nodes
kubectl drain node01 --ignore-daemonsets
kubectl uncordon node01
A common administration task.
3. Mark Nodes Unschedulable
kubectl cordon node01
Know the difference between cordon and drain.
4. Upgrade a Kubernetes Node
Practice kubeadm upgrade procedures in a lab environment.
5. Backup and Restore etcd
A high-value CKA topic.
Practice:
Pods & Deployments
6. Create a Pod
kubectl run nginx --image=nginx
7. Create a Deployment
kubectl create deployment nginx \
--image=nginx
8. Scale Deployments
kubectl scale deployment nginx \
--replicas=5
kubectl set image deployment/nginx \
nginx=nginx:latest
10. Roll Back a Deployment
kubectl rollout undo deployment nginx
11. Expose Applications
Practice:
ClusterIP
NodePort
LoadBalancer
12. Debug CrashLoopBackOff Pods
Use:
kubectl logs
kubectl describe pod
Scheduling
13. Node Selectors
Schedule workloads on specific nodes.
14. Node Affinity
Practice preferred and required affinity.
15. Taints and Tolerations
One of the most tested topics.
16. Static Pods
Create and modify static pods.
17. Multi-Container Pods
Practice sidecar patterns.
Networking
18. Create Network Policies
Allow traffic.
Block traffic.
Restrict namespaces.
19. Verify Service Connectivity
Use:
kubectl exec
curl
Understand DNS troubleshooting basics.
21. Troubleshoot Service Discovery
Practice:
nslookup
dig
inside pods.
22. Ingress Basics
Create simple ingress resources.
Storage
23. Create Persistent Volumes
Practice static PV creation.
24. Create PVCs
Bind applications to storage.
25. Verify Storage Mounts
Ensure pods can access mounted data.
26. Troubleshoot Pending PVCs
Understand why storage claims fail.
Security
27. Create Service Accounts
kubectl create serviceaccount app-sa
Practice:
Roles
ClusterRoles
RoleBindings
ClusterRoleBindings
29. Verify Permissions
Use:
kubectl auth can-i
This command is extremely useful during the exam.
Troubleshooting
30. Troubleshoot Everything
The best CKA candidates become excellent troubleshooters.
Practice fixing:
Pending Pods
CrashLoopBackOff
ImagePullBackOff
Failed Scheduling
DNS Failures
Network Policy Issues
Storage Problems
RBAC Errors
If you can troubleshoot confidently, you’re already halfway to passing the exam.
My Personal Practice Strategy
When preparing for the CKA, I didn’t focus on reading theory repeatedly.
Instead, I followed a simple cycle:
Learn
Understand the concept.
Practice
Perform the task yourself.
Break
Intentionally create problems.
Fix
Troubleshoot until it works.
This approach helped me develop the practical skills required for a performance-based certification exam.
Final Thoughts
The CKA exam doesn’t test whether you can memorize Kubernetes documentation. It tests whether you can administer a Kubernetes cluster efficiently under pressure.
If you can comfortably perform these 30 tasks without constantly searching for answers, you’ll be well prepared for exam day.
Focus on hands-on practice, troubleshooting, and understanding how Kubernetes components work together.
That’s what ultimately helped me pass the CKA and continue my journey toward becoming a Kubestronaut.
Connect With Me
If you’re preparing for Kubernetes certifications, pursuing the Kubestronaut journey, or working in the cloud-native ecosystem, I’d love to connect.
Follow me for more articles on Kubernetes, CNCF certifications, DevOps, Platform Engineering, and Cloud-Native technologies.
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