Apple Engineer interview questions

Applied online, got a call from recruiter. Had a 1:1 phone technical interview, got an email from HR after one week for an on-site interview. Interview by 15 people(30 minutes each) followed by 3 more phone interviews. Got an offer after one more week. Most of the interviews are purely technical trying to understand my background and cultural fit. Show enthusiasm and positive attitude during interview. Pay attention to detail and listen carefully to interviewers. Be proactive and ask questions. Be candid in your answers. Good Luck!!