There are two certificates offered by Kubernetes:
Certified Kubernetes Administrator (CKA):-
Certified Kubernetes Application Developer (CKAD):-
In order to clear these certification exams you can have a look at the following Kubernetes Training Course which will give you all the insights which you will need to clear these exams.
On the other hand Docker provides a profession certification:
Here is the link of a common certification program which is being provided by Intellipaat these will also help you in order to clear these official certification exam. For that you can take up the DevOps Training Course. Here is the link of the video tutorial by which I came to know all these things. .