Apple Software Developer interview questions

Initially I received a call from a recruiter that found my profile on Linkedin. Then I had two technical phone interviews, with questions on my experience and about programming, data structures and algorithms. I one of them I had to connect to an online coding site to analyze and modify some code. Finally, I was invited to an onsite interview. There I met 9 people, including my recruiter, and was asked questions about programming and, mainly, solving problems in whiteboard. Some problems did not involve writing code, but sketching a solution on the board.