I applied through college or university. The process took 2 days. I interviewed at Cognizant (Calcutta) in Dec 2013
Interview
The interview took place after clearing a set of questions which consisted of riddles and logical reasoning. This isn't too hard to clear. The technical interviewer asked me questions from all Computer Science core subjects but none of the questions were hard. All were easy. You should know some programming though. You'll be all set then.
Introduction
Basic of Oops and Programming
2 Coding Questions
Reverse String and Number
Question on Java and SQL Spring Boot and Other programing related questions like hashing map vs hash table why they are used
It was three round interview with written test and 2 easy interviews. One technical and one with HR for compensation discussion. All were conducted on the same day. In order to get selected need to stand out and answer uniquely.