Why is the "exam" gone?
After doing all the "real world tranlations" the "test out of this skill" disappeared. Why? I want to do that knowledge test! Could you please add that back!
Because you mastered the skill already- you should see that it has turned gold in your skill tree. The exam is a shortcut to mark a skill as mastered- it's not like the final exam in school, where you have to pass it to pass the skill. Once you've showed mastery through real-world practice, there's no need to prove it again with a shortcut exam.