two stages were there in this company
written test and personal interview.

criteria

60% throughout.

tell me about urself?
what r ur hobbies?
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?

do all problems of R.S Agrawal both verbal and nonverbal and practice little english everyday.

bst of luck

40 got selected finally.

good academic career and communication skill.