Apple Software Engineer interview questions

Was referred for this position. Went thru 7 rounds of interview. Not very difficult data structure and algorithm questions. More focus on approach and conceptual knowledge than giving a very difficult algorithm.

This was by far the worst interview process I had ever experienced. I applied online and was contacted by a recruiter for a specific role. She never contacted me back to set up a time but later that week an engineer called me and was under the impression our interview was confirmed for that time. I was completely unprepared and so I told him that the recruiter hadn't set up a time but he gave me the impression that once it was confirmed with him he couldnt reschedule so it was either then or never. I went through the interview but wasn't ready and did not perform very well not surprisingly.