The whole process is pretty well structured and clear from the beginning. But what’s frustrating was the lack of feed back. I interviewed with Facebook 3 times and was rejected 3 times. I understand I may not be what they’re looking for but not telling me why tells me absolutely nothing about why I wasn’t chosen and can’t improve. Each time the recruiter follows up and ask me if I have any question but cannot give any feedback from the interview, what am I going to ask how was your day? At that point just send me an email and not waste my schedule.