I applied through college or university. The process took 1 day. I interviewed at UST (Chennai) in Feb 2012
Interview
Campus recruitment, Aptitude Test, Group Discussion and HR interview. General quantitative aptitude and GD topic was (How to make Tamil Nadu no 1 state in India?) HR interview was general Behavioral questions. It was very easy process, they just check your communication skills and confidence. No technical questions in campus recruitment.