IBM

They first gave me a coding interview. The interview had three questions. The questions were quite simple and mostly required a simple math trick to solve. I passed all test cases but never got a call back.

I had seven rounds of interviews. Each round was tougher than the last. All rounds were technical except the seventh, which was with the project manager. The first few rounds were based on my resume, but the later rounds focused on technical skills

It was split into five rounds, conducted with appropriate space and time. Everything was smooth. It wasn't conducted at a single glance but split into different rounds of short durations. The panel was gentle.