ODC is still undergoing many changes and raises doubts in some questions in the certification exam - as some changes happen in a period close to the test we have scheduled (has the answer to the test already been corrected)
For example, roles, initially the roles could not be shared, but later they could.
I suggest having an email or a form of communication - it could be in the course material itself indicating that the certification questions already refer to updates to the material, or something like that, to ensure that there are no doubts about what we should answer.
Or of course, and perhaps easier to manage, a certification is only released after the OutSystems version and the documentation is stable.