Apple Mechanical Engineer interview questions

2 rounds of half to full day on site interviews with 4-5 individuals each day for a total of 8-10 people. Expect that you'll have to take a 1/2 day to full day off to interview with Apple. Culminating in a 1 week take home design challenge where you come back in and present your solution to a panel of the same people that interviewed earlier. They put you on the spot.