Probably one of the more frustrating interviews I've ever done. Before they screened me they gave me two iOS projects to do. The projects themselves weren't too difficult but it consisted of two parts that were both very long. I spent about 8 hours doing them per spec but they declined to move further. No information was given as to why but after pressing for it they gave me a canned response about how my project was incomplete. I went down the list of possible reasons why I wasn't selected and none of them applied to me. It seemed to me they weren't really interested in my qualifications from the get go so I'm not sure why they had me spend a significant amount of time working on their projects. If you're smarter than me you'll probably Google the questions and find the solution instead of wasting your time creating your own. After I submitted mine, I found a number of public Github repos with the solutions.