I recently passed CKA abd CKS exams after passing EX288 4.5. and in the road for the EX280. doing CKx gave me the knowledge of the k8s core concepts and showed me better what Openshift bring to the table over K8S to provide a solid production PAAS ready for Enterprise use. The CKS is sponsorized by StackRock recently acquired by Red Hat and which product was renamed Red Hat Advanced Cluster Security For Kubernetes.
