This course was a great review, thanks! I agree with another summary that Physics.Raycast shows up a lot! There was also quite a lot on Particles, and on the difference Animator vs. Animation.
A friend lent me access to the Unity course review, and I glanced at it last night – I think this Udemy course is much much better for actually explaining the concepts well (the Unity course is mainly following along as someone step by step builds a game). However – several of the exam questions (maybe 20%) were taken exactly word-for-word from the self-test in the Unity course. I had to review materials and particles one more time after I took their practice test, but otherwise I felt very prepared from this Udemy course.
The exam is clearly broken up into small sections (Physics, Materials, Lighting, Programming, etc) and after each section you find out immediately how many you got right. The proctors seemed to just assume that everybody in the room was going to pass, so they must have a pretty high success rate in general.
Best wishes to everyone taking the course!