Applied to a PhD program in the usual way. GRE, TOEFL, LoRs, diplomas etc. I had to go through a skype interview also. At the end, I got admitted. Now, I am in my third year.
Interview questions [1]
Question 1
There were no difficult questions really. Just what I have done in the past.
I applied in-person. The process took 1 day. I interviewed at UCLA (Los Angeles, CA) in Sep 2009
Interview
Interviewed with potential PI's throughout department. Each interview went for ~30 minutes and ran through resume - talked about previous research experience and why I was interested in their specific lab.
Also met with all the post-docs and graduate students currently in the lab. Talked with each one individually for ~5-10 minutes and they explained their project at a higher level.