Apple Developer interview questions

It started from a short HR talk, then go through an interview mainly focus on my background and past project. It takes more than three weeks to have the first technical interview. The interview checked many projects that are relevant to their interest. Questions are very detailed, it definitely needs for applicant to have a very clear idea to talk about. Since I have several research based projects listed on my resume. The questions are developed around my experiences. The process takes about 50 min.