Expected CKA Exam Topics, as suggested by Linux Foundation :

• Module 1: Storage: It explains storage classes, persistent volumes, volume mode, access modes, persistent volume claims primitive, and reclaim policies for volumes. Furthermore, this topic deals with configuring applications with persistent storage.
• Module 2: Troubleshooting: This topic discusses cluster and node logging, monitoring applications, managing container stdout, and stderr logs. It also deals with troubleshooting application failure, cluster component failure, and networking.
• Module 3: Workloads & Scheduling: Its sub-topics are manifest management and common templating tools, primitives, scaling apps, ConfigMaps, and performing rolling update and rollbacks.
• Module 4: Cluster Architecture, Installation & Configuration: In this questions about role based access control (RBAC), highly-available Kubernetes cluster, deployment of a Kubernetes cluster, etcd backup, and restore are included.
• Module 5: Services & Networking: This topic tests you understandings of host networking configuration, connectivity between Pods, ClusterIP, NodePort, LoadBalancer service types and endpoints. It also explains how to use Ingress controllers and Ingress resources, configure and use CoreDNS. Lastly, it discusses choosing a suitable container network interface plugin.