there were two stages
written and personal interview.

10th&12th&B.E-60%.

tell me about urself?
what is ur favourite subject?
why u want to join patni?
what r the major challenges that u have crossed through?
how u think u r suitsble 4 this company.justify?
explain ur 4 years experience?

to get into patni is very easy what u have 2 do is just to practice Rs aggarwal 2 days before the xam.u will easily get through it.

best of luck.

200 approx applied out of which finally 40 got selected.

good aptitude level