I just submitted my application for Regular Decision. How do the alumni interviews work? Will I be contacted by the school (like how it worked with Princeton) or will I have to set up an interview on my own with my NetID?
You will need to set up an interview yourself through the Applicant Activity portal. I would also say that the interview has little bearing on your overall application, so it is not necessary. Additionally, the person that will be interviewing you is most likely a student.