Tipalti Full Stack Developer interview questions

Had phone call from the HR. At first, I received a home assignment, and then was called for an interview. The first interview includes an exercise which you have 1 hour to solve. Then, you go over your solution with the interviewer. On the next interview, I was asked a design question.

home mission sent by email and then they call and said i passed to the technical interview which takes 2 hours (another exam easier than the mission and interview). i used java they preffer c sharp