in congnizent their is 4 rounds ..
1. personal interview
2. aptitude test
3. HR round
4. manager round
in personal round they asked first question tell me about your self ? and then family background he asked my personal life
After 2 round in test some grammatical/vocabulary/logical . in 3 round some subject knowledge questions and why congnizent ? what you know about our company? like that after completed 3 round in 4 th round was manager round in this round they ask about salary and your personal life ..some technical question