I know the CKA exam is open-book in the sense that you can access the official Kubernetes documentation. Is it possible to pass without buying expensive courses? If I master the search functionality on the K8s site and understand where the examples are, is that enough to get through the performance-based tasks, or are the questions designed to be tricky?
3 answers
Technically, yes, you can pass using only the docs, but the real enemy is time, not the difficulty of the questions. The CKA gives you 2 hours for 17-20 tasks. If you are searching the documentation for every command, you will fail. You should use the documentation only as a "safety net" to copy-paste long YAML snippets, like a PersistentVolume definition or a complex Ingress rule. You need to have the fundamental commands and the structure of a Pod/Deployment memorized. My tip: bookmark the "Tasks" section of the official docs. It’s organized by specific actions like "Configure Liveness Probes," which is exactly how the exam questions are phrased.
Do you have a home lab or a local Minikube setup where you can practice these tasks repeatedly until the commands become second nature and part of your muscle memory?
The search bar on the K8s site is your best friend. Practice using it to find the 'Cheat Sheet' page; it has almost everything you need for the basic tasks in one place.
The Cheat Sheet is legendary! I had that page open for the entire duration of my exam. It’s the fastest way to find imperative command syntax without clicking through multiple pages.
Kevin makes a great point. Muscle memory is everything. You should be able to type k get po -A without thinking. I recommend practicing on "Killer.sh"—it’s a simulator that is actually much harder than the real exam. If you can clear that simulator with minimal help from the documentation, the actual CKA will feel much more manageable. The documentation is great for looking up the specific fields of a 'ResourceQuota', but you shouldn't be learning the concept of a quota while the clock is ticking.