From Failure to Success: CKS Exam Report and Tips for Future Kubestronauts

I obtained CKA, KCNA, CKAD, and KCSA between January 11th and February 6th, 2026. Recently, I took the CKS—the final remaining Kubernetes certification for me—on March 13th and 17th (retake), and I am happy to share that I passed! I have officially become a Kubestronaut. Certified Kubernetes Security Specialist (CKS) Exam Results I passed with a score of 79 % (passing score is 67 %). I used the entire exam duration of 2 hours. Exam Date: March 17, 2026, 10:00 AM~ Location: Private room in a co-working space Device: MacBook Air (2022, M2, 13.6-inch) Thoughts and Difficulty To be honest, I failed my first attempt on March 13th with a score of 44 %. During the first try, I ran out of time and left 5 questions unanswered. Even if I had more time, there were about 3 questions I simply didn't know how to solve. In my case, I was comfortable with Kubernetes and third-party tool operations, but Linux administration was my weakness. After spending the four days between exams reviewing basic Lin