Booking.com Software Engineer II interview questions

Fairly descent interview, Interviewers were nice and helpful and everything went almost well. I didn't get an offer but thats not the problem, I atleast expected a little context on why asides them moving to a better candidate, I followed up with recruiter and - you guest it - I remain ghosted. Coding Round: Trip Itenerary problem. See LC reconstruct-itinerary System Design Round: Design Credit Card Fraud Detection System Culture Fit Round: Basically a Behavioural Round on experience working as an engineer * How do you know your API is working? * How do you learn? Also follow up converstation on being a T-shaped engineer. * Why booking? When you helped another engineer succeed, how you give feedback, growth mindset, all that jazz. * Your motivations? Over 35 questions asked including follow ups during the culture fit round. Come prepared with all your stories on this round, my interviewer kept asking me for more stories for everything I say.