The purpose of the Certified Kubernetes Administrator (CKA) program is to provide assurance that CKAs have the skills, knowledge, and competency to perform the responsibilities of Kubernetes administrators.
It is an online, proctored, performance-based test that requires solving multiple issues from a command line.
The online exam consists of a set of performance-based items (problems) to be solved in a command line and candidates have 2 hours to complete the tasks.
The Certification focuses on the skills required to be a successful Kubernetes Administrator in industry today.
More details are available here.