Like everyone else mentioned, firstly you do some mathematical and logical tests. You have time limit for each part of the test. It is not hard, just some basic maths like equations and testing how fast can you find numbers, letters and symbols. The WORST part of this interview proccess is that only when you get to the interview which is held in person in Belgrade, not online, you find out that the training course is held in Sofia, Bulgaria for 3 months. It is very unproffessional in my opinion to not mention something like that in the first place, especially because the ad for the job said it was suitable for students.
