Booking.com Software Engineer I interview questions

HR recruiter found me via LinkedIn and submitted me as a candidate, I passed the first coding exam at hackerrank and failed in phone call code interview. technical recruiter was a great person and the whole experience was good. They didn't ask me to run the solution in code interview, the just wanted to see how do I think. I was previously scared because I already did some solutions in codepair and in the same link that they sent (which supposed to store the code), but they told me not to worry about that. after about 3 hints I think I was judged as a weak developer. I kept talking about what I am doing and they were satisfied about that and they considered that I have a good communications skills. questions in the first code test was from easy-group in hackerrank but the questions weren't ready questions in the website, they were prepared by booking.com. the major problem in code test at hackerrank was the time, and you should be prepared well for getting the inputs and outputs (stout, stdin). I checked the reviews here and I saw a majority of persons who passed the first code tests but then failed in on-site test in Amsterdam, so I wasn't so optimistic about going there, even if I've passed the phone call interview.