I applied online. I interviewed at Tesla (Las Vegas, NV) in Oct 2015
Interview
It's kind of a lengthy process. You fill out an online questionnaire, they interview you on the phone if they like you. You have to pass an online typing speed exam and a series of multiple choice questions. If they like you, you will be invited to an actually interview--usually a panel, consisting of about 3 people. Pretty fast decision whether they will hire you or not.
Interview questions [2]
Question 1
Why do you want to work for us? Where do you see yourself 5 years from now? What do you know about the company? --- all really basic questions.