CKA vs CKAD vs CKS: Which Kubernetes Certification?
I passed all three. Here is the optimal order and why each matters.
The Three Certs
CKA — administer clusters, troubleshoot nodes, manage networking. CKAD — deploy apps, manage workloads, configure resources. CKS — harden clusters, secure supply chains, runtime security (requires CKA).
| CKA | CKAD | CKS | |
|---|---|---|---|
| Prerequisites | None | None | Valid CKA |
| Exam | Performance-based, 2hr | Performance-based, 2hr | Performance-based, 2hr |
| Cost | $395 (incl retake) | $395 (incl retake) | $395 (incl retake) |
| Difficulty | Intermediate | Intermediate | Advanced |
| Study time | 6-10 weeks | 4-8 weeks | 8-12 weeks |
| Salary impact | +$10K-$18K | +$8K-$15K | +$15K-$25K |
Recommended Path
- CKA first — broadest foundation, unlocks CKS
- CKS second — highest salary premium
- CKAD third — if you also do app development
Developers: start CKAD, then CKA to expand.
Study Tips
- Use killer.sh (included with registration)
- Master imperative kubectl commands
- Practice with a timer — 8 min max per task
- Official K8s docs are allowed during exam
FAQ
Can I take CKS without CKA?
No. Valid CKA is required.
Which has highest salary impact?
CKS — $15K-$25K premium. Smallest talent pool.
Recognized outside US?
Yes. CNCF credentials are global.
Free Kubernetes courses. CKA study guide. Code CLOUDPATH for 20% off K8s tools.