I applied through college or university. I interviewed at UCLA (Los Angeles, CA) in Mar 2014
Interview
UCLA application process, pass qualifying exam after course completion, interview with advisor, one academic quarter is generally a trial period to see how you fit in to the group and if you're demonstrating good performance. The goal of the entire process is to see if you are both capable and motivated to accomplish what the lab needs (as well as if you'll have the fortitude to see it through in the face of many failures).
Interview questions [1]
Question 1
Many techincal questions for qualifying exam. PI asks how is your background valuable to this lab's work and what do you hope to achieve here. Why do you want to do this R&D?
I applied through college or university. The process took 2 weeks. I interviewed at UCLA (Los Angeles, CA) in Dec 2016
Interview
Relaxed, easy going, professional, casual. I was asked several questions about how I would approach a problem and what I would do to fix it. They also asked a few riddles to see my thought process.
I applied online. The process took 2 weeks. I interviewed at UCLA (Santa Monica, CA) in Apr 2015
Interview
They call you for a phone interview, once you get through the phone interview they have you come in for a personal interview. My interview was in front of a panel of 4 people. They were very nice and made me feel comfortable. I was hired within a week and I started my training within a month.