Alex Kowal wrote:Should I study these topics for the exam or not?
In principle, the exam objectives are the ultimate source of truth for any of these exams.
Oracle Java 11 exam objectives
Note they enumerate the objectives under "Review exam topics".
Now, that said, they're pretty vague at best allowing all kinds of things to possibly show up. And while there's a bunch of practical experience in the field over what has, and what has not been seen, they're within their rights to (indeed they "should") add new questions from time to time.
So, take all the advice you can get, and try to learn the topic, not the answers. If you understand, you can work out a decent response to a question on a topic that's not 100% familiar, if you merely learn, maybe not so much.
Sorry, that's less help than perhaps you wanted...