I applied through university. The process took 5 days. I interviewed at Cognizant (Bhubaneshwar) in Sept 2015
Interview
Technical followed by HR. sometimes in skype. Then face to face.
formation of groups for GD, if you clear then PI.
Few days later offer code will come on email.
Topics for GD is usually the current affairs, all depends on how you can make your strong point in front of other competitors and the panel.