Booking.com Software Engineer interview questions

The process consisted of 2 parts. I submitted my CV at a Job Fair organized at the University, I was emailed the night to have an in person interview the day after, which lasted less than 1 hour (with 2 interviewers). After that, they let me know in a couple of days that they would have liked to meet in person for the second part of the interview. In about a week we organized the trip to Amsterdam. The second part consisted of 3 interviews plus some HR questions (like "why booking?"). The first one was a 1 hour technical interview pretty similar to the first one. The people did not put much pressure during my time solving the problems, but they did question my decisions and asked what other choices there would have been and why I didn't pick them. The second one was again 1 hour interview, this time more focused on the design of components and the architecture choices to make. Both these interviews were with 2 interviewers, who were developers. They wanted me to extremely precise in the system I was describing ( I explained the same design in 3 different ways). I don't think I performed too well in this part. The last one, 1 hour too, was about business understanding. This time it was 1 on 1 and the interviewer was the lead of team leads. It was a really relaxed and interesting interview, where he asked me if I knew the business model of Booking.com, what I would have changed in the site (asking to elaborate quite a bit on my replies), how I would decide if a feature under testing should be made permanent or not. At the end of the interviews they showed me the building. In a couple of days HR called me to tell me they liked me and she sent me an offer

I applied online, then I received a call after one week to make a phone interview with a recruiter. It is about my experience and current employer. I received an invitation for online test which was 4 questions for 75 minutes. I had a technical interview with two persons and asked to solve two problems.