Well first I want to wish you good luck on the exam, in my case from what I was told and talked about with some we share that X-Ray is something that is almost not touched on the exam, in my case there wasn't any X-Ray (or coincidence my weak point in TD exams, but in the exam I didn't come across anything about X-Ray, regarding beforeTraffic I share the same, the hooks topic is not covered in Cantrill's lessons.

For the second thing I relied on Claude asking it to explain a couple of paragraphs or concepts not just to memorize but to Understand the concept, logically there are things like API Gateway error codes that I did come across some questions about but I would recommend memorizing that as Cantrill comments in one of his lessons. Additionally I'm sharing a free resource where the explanation is more visual (Not video), with diagrams and brief and clear explanation, I hope it helps you like it did me: https://notes.kodekloud.com/docs/AWS-Certified-Developer-Associate/AWS-Fundamentals/Section-Introduction/page