LinkedIn Sr. Software Engineer interview questions

Was contacted by a LinkedIn recruiter on LinkedIn. After a brief chat, he scheduled a 1 hour phone interview with 2 algorithm questions. After passing the phone interview, I was invited for a 5-hour on-site, with one algorithm session (another 2 algorithm questions), one system design question, one non-technical lunch session, one Android coding question, and one cultural fit session. A little over a week later, received word that the hiring committee would like to move forward, and one week after that was plugged into a team and got a written offer. Whole process from the time recruiter contacted me took about 5 weeks.

Applied through linkedin and got a call from the recruiter. Had a phone interview which I thought did not go very well, but I still got a an invite for Onsite. Onsite was 6 rounds - Both the coding questions were easy, but for one of the coding rounds it took me sometime to come up with the solution and was not able to complete all requirements of the coding exercise. I thought LinkedIn values your thought process and how you arrive at the solution. They only look to it that you get the perfect answer within the first go, which is strange, because nobody who tries to solve a coding problem in the first go can solve it perfectly unless he/she has already solved it earlier. One of the coding interviewer had heavy accent and I was not able to completely understand him. He seemed hostile when I asked him to repeat. But I managed to do that round of coding and he seemed satisfied with my solution at the end of it. The design question were very vague and unless you say the points that the interviewer has in mind you will probably fail that round too. Couple of days later the recruiter informed me that I did not make it.