I applied through college or university. I interviewed at Ipsos (Mumbai) in Jan 2012
Interview
There was a 30 min aptitude test which included simple maths and data sufficiency questions.The test was very easy we had to solve 30 questions in 30 min.It was easy.The next round was making a survey questionairre and presentation which was also very easy.once you are through apti you are almost in.Just a small HR interview they just check if you are willing to undergo a training programe successfully.