A little basic knowledge of probability.

The most basic point vector calculation, can't even multiply the difference.

These have been compressed to the limit.

It is best to learn some mathematical and physical methods, and you can solve some mathematical equations, harmonic oscillator and hydrogen atom. Of course, this is not necessary, and it is not impossible to remember the conclusion directly.

It depends on where you took the exam. Different schools vary greatly. Better get the real question. There are always traces in the exam.