Apple Sr Software Engineer interview questions

One phone and One Face to Face interview. Went in details of binary search algorithms and Core Java fundamentals such as internals of HashMap, String intern etc. The interview was 3 hour long and included 3 panelists who interviewed for one hour each.

I was contacted by a recruiter who discussed the requirements of the team. The project was top secret so they could not disclose what I would be working on. I had two rounds of phone interviews which involved discussions on concepts in machine learning and natural language processing. I was then invited for a series of on site interview which lasted 3.5 hours. These were similar to the phone interview but were more detailed and probing. Overall, I found the engineers to be of top quality and extremely devoted to the success of the project. I was also impressed by the hiring experience. The entire process took less than two weeks and I was continually updated (by email) of my status even late one Friday evening.