Apple Product Design Engineer interview questions

Phone interview-40 minutes. All the questions are about the details of my resume. The hire manager also asked some basic mechanical questions for example how to design a gear. If you change the speed of the gears will the power transmitted to the next gear change. At first I don't answer some of the questions but the hire manager inspired me a lot.

got referred by current employee, got an email setting up interview extremely fast. Had one 45 minute interview with someone who works in the group I applied for