Airbnb Software Engineer(Internship) interview questions

I interviewed with Airbnb for a SWE intern position in October, 2018. I submitted my resume in an on-campus recruiting event and I heard back in roughly 1 week and was given an online challenge (~45 min HackerRank challenge). The HR reached out after I submitted the online challenge and asked me to schedule two 45 minutes technical phone interview with the engineers. The questions are Leetcode medium/hard level. What came next is a culture fit round, they ask you standard behavior questions but also questions related to Airbnb and traveling. If you passed all the rounds, you will receive a phone call form the HR discussing the offer. Airbnb moves fast with the interview process and overall it is a very positive experience!

It was really hard. The guy didn't give me any hints and I have to think by myself. I don't understand the meaning of been silent and unhelpful. I think Airbnb is by far the most difficult interview that I have ever been given.