I applied in-person. The process took 4 weeks. I interviewed at Georgia Tech (Atlanta, GA)
Interview
The interview process wasn't an interview to get into the school, it was an application of your past records and test scores plus an essay or two. There was interviews with the various professors that you might work with. Those for me were pretty laid back. They mostly asked what type of things I had worked on previously, what my motivations for going to graduate school were, and what my research interests were. I don't remember any technical questions. I recommend during the advisor search to schedule your interviews early.
I applied online. I interviewed at Georgia Tech (Atlanta, GA) in Jan 2013
Interview
First you apply online through the Buzzport portal. Usually a committee of new faculty reviews your application, which includes GRE scores, undergrad transcripts, and your research experience as an undergrad. I think there were also some personal essays too. Then it usually takes 1 to 2 months to hear if you are accepted. If you are, of course you would come in August, and at that time you have approximately 1 and a half months to decide on your faculty advisor. However, many students email the professors as soon as they are accepted to get an idea of who they would like to work with beforehand.
I applied in-person. The process took 1 day. I interviewed at Georgia Tech (Atlanta, GA) in Jan 2012
Interview
Very relaxed, not really interview, more like just chatting between friends. Just talk to professor about my interest and plan for my graduate school in the future.
Then talked about course work, my knowledge background, programming experience etc.
Since this is not like job interview in industry, and I am already enrolled in the graduate school.