I applied online. I interviewed at IBM in Apr 2018
Interview
Half an hour presentation and followed by questions in a phone interview. Pretty the same as the previous comments. All the question are related to your past research. Not difficult if you are really familiar with your research.
I applied through an employee referral. The process took 1 day. I interviewed at IBM (San Jose, CA) in Aug 2016
Interview
Gave a talk, then met with at least 5 other people, including managers and staff members. With a tour. I was selected primarily because I knew someone in the company and interviewed accordingly. Everyone gave their view on my position and the company in general. Very nice people
I applied online. The process took 4 weeks. I interviewed at IBM (New York, NY)
Interview
Phone screen on research followed by onsite interview. One hour presentation and questions. This was followed by individual sessions with 12-15 researchers of each approximately 30 minutes. Each session depends on the researcher who is interviewing you. Some can be hard and some can be relaxing but it is a great place to be in. The presentation was extremely well attended even by senior managers.
Interview questions [1]
Question 1
Lots of research specific questions where they dig into details of your work. Due to the diverse nature of researchers present in your panel some of them would be very comfortable in your area and they can ask good questions which need well thought answers.