Can attempt the CKA Certification exam after the Course? or we need any more preparation
Looks like this course doesn’t cover some "low" level stuff, like manual installation of k8s cluster. I strongly recommend you to do famous k8s the hard way (https://github.com/kelseyhightower/kubernetes-the-hard-way) few times, it will help you a lot. On CKA curriculum (https://github.com/cncf/curriculum) you can see, that candidate must be able to "create and manage TLS certificates for cluster components" and also be able to troubleshoot control plane /node/networking failures. So you also must be able to troubleshoot systemd services, know what systemd units are, how to check it’s logs, etc. I could also recommend to practice how to setup cluster using kubeadm. IMO currently you can’t pass CKA only using this course.
No. It doesn’t cover everything required for the CKA 🙁