Booking.com Developer interview questions

I attended three steps of interviews. These are Online Coding, System Design and Cultural Fit. All of them were comprehensive and challenging. At the initial, I was called online by recruiter.This was about introduction,job,education and work experiences. At first 15-20 minutes of coding interview, interviewers asked some questions about data structures. Afer this part, I was asked a coding problem. It was a hard level question. I think candidate should have 10 minutes to think and design solution in mind. By talking and answering questions, coding is too hard. System design interview was pretty good. Duration is 90 minutes. Candidates should tell about functional and non-functional requirements, estimations, tradeoffs, bottlenecks, database design, API design, database selection and draw design. Cultural fit is a tiring interview as well. Duration is 60 min. I was asked 12 questions in one hour. First part consists of questions about behavorial and career. Second part is about Booking such as how booking makes money and what Booking's business model.(agency vs merchant)

The process was very smooth and interviewers are very friendly. There was a 3 rounds. 1. Introduction Round(30 minutes): This was with Engineering Manager he was more friendly and It's all about us , our area of interest . He explained all the upcoming rounds and what they expect on each round. 2. Behaviour Round(60 minutes): This round with two tech persons from Booking where they asked about our past experience and situation based questions. They expect us to share our previous experience, how we handle in specific situation. It went smooth and I asked more questions about booking ,technologies and work where they replied very calm. Almost this round looks like a chat with peer. Pair Interview(90 minutes): I was given 1 technical program to solve. I paired with 2 booking tech persons. First they explained the process and expect us to solve in TDD approach and also need to explain each and every line of the code why we need it. They also more friendly and Its also like we are doing some code program with colleagues. I can able to solve it time. Over all process was very smooth and composed. They apparently explained what they expect in the rounds.