It would help if you had a lot of patience to answer for what has been asked. As it consumes your whole day dealing with different managers and recruiters. There are situations where you need to present few scenarios to the interviewers. Nothing to fear, but you need to be strong enough in all the basics and believe in your potentials. All the best!!!!

IBM is really company, it has average interview process. With hands on knowledge you can crack the interview. It depends on for which role you are giving the interview and who is the interviewer.