just go in and have a normal interview. the interviewer would ask the normal question like why should we choose you and it was pretty smooth sailing. After that you would wait for at the lounge and they;d call up the next person.

aptitude, technical, HR round all three rounds will be great don't worry they will ask you basic questions about syllabus and then they will ask you technical questions and then they will ask some other questions and you will get into HR round