There are three stages of interview, a 20-30min interview on phone, a flew-in group interview at one of the facilities and an exit interview with additional questions. Phone interview consist of typical questions like where do you see yourself in 5 years and some non-technical question for basic reasoning ability. Group interview usually involve a hands on project (i.e building a tower with paper) and presentations. The interview is quite lengthy (5~6 hours) but majority of the time they are explaining the type of work you'll be doing. Third interview is more concrete question asking your preference on segment, and working environment.