Autodesk Senior Software Engineer interview questions

It started with a phone call and going over the cv, then personal interview with tech question with the team leader and someone else from the team, home exercise (although I heard not everyone get it as they have trouble requiting and trying to just take anyone that accept), and finally there was an HR interview with someone truly unpleasant, but she really tried.

The first two meetings are two interviewer, and all I got four round meetings in four hours, and I Just writing code and ideas on blackboard more than 3 hours