Basically just java and OOP, including data types, encapsulation, access modifier, genetics and so on. All content could be found from the university's course, a thourough review of the slides really helped.
I applied online. The process took 2 weeks. I interviewed at Minimax Labs (London, England)
Interview
2 remote interviews. They were rather easy and well done.
1 onsite interview. I was in a room alone for a few hours doing a task.
Upon completing the task , the "interview" was over. No feedback was ever given.
Rather disappointing to not receive any feedback after 3 interviews.