CKA / CKAD / CKS thanks to KodeKloud
I got my CKA / CKAD / CKS certs, all of them at the first take. I used KodeKloud to prepare the three exams. I think it offers a balanced combination of comprehensive theory, labs for every lesson and a set of mock exams and challenges to be well prepared. I strongly recommend it to prepare CNCF certifications.