I applied through college or university. The process took 1 day. I interviewed at UST (Coimbatore) in Feb 2010
Interview
Fresh out of college - Aptitute, Group Discussion and HR discussion. The crowd was huge, all they were expecting is how enthusiastic and whether you fit in to their culture.
I applied through a staffing agency. The process took 1+ week. I interviewed at UST (Bengaluru) in Aug 2014
Interview
Had attended one round of Telephonic technical interview with UST and a round of Technical interview with their client. Client was happy with the way interview went on and took me to discussion about notice period. I am still waiting for the offer.
I applied through a recruiter. The process took 2 weeks. I interviewed at UST
Interview
Not very difficult. The company takes you if the basics are clear. But after entering there would be multiple interviews from the client side which would be quite tough. Then if the client doesn't select, the resource is put into talent pool.