It was long process for sure. In total there were 6 interviews and spent 3 days. Total waste of time I would say. Can’t specify because of signed agreement with them

two questions about trees and the order of extracting data. 45 min. interview, no small-talk. first 5 min. were about the interviewer presenting the company and the interview process. had 5 min. at the end for questions, nice interviewer.