two stages
1)written test
2-interview.

criteria
10&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?

be confident & have faith in god.u will surely succedd in the xam.

all the best.

200 approx applied out of which finally 40 got selected.

good aptitude level .