Booking.com Data Scientist interview questions

A recruiter contacted me through linkedin. Then I had a 40 minutes phone interview with HR about my background in data science and a short question about 80/20 customer service model. The day after I was sent a business case to solve in 3 days. I had to write about a data analysis using Booking.com data. The third phase was an interview with 2 data scientists of the team. The interview (45 min in total) consisted of explaining a data science project I had done and a business case (15-20 min)