There will be 3-4 rounds, Aptitude, Technical Interview ---- programming skills, PD Round, Hr Round. Mostly questions are related with your skills, basic C,C++ and OOPs, some questions are related with your subjects where you got high scoring marks.
PD Round is little bit lengthy, they will judge your personality overall your attitude towards work, life, family and more others.
Prepare yourself that you are the best and believe yourself that you can complete your task within a time frame, it will equally very beneficial with technical.