re: What are the hardest professions for interviews? And easiest?

I interviewed with a big investment bank once for a position I wasn't qualified for. It was mainly for interview experience, which I think is very valuable.

Anyways, it took 8 hours with 6 panels of 2-3 investment bankers. They would throw out investment scenarios and case studies and get me to read and react on the spot. Then they'd ask tough follow up questions. These people were all very experienced and have academic pedigree well-above my own.

My pits sweated through my undershirt, dress shirt, and suit jacket. Most mentally draining and difficult interview imaginable in an office setting.

ETA:

I did NOT get the job, but they liked the interview and asked me to come in again for another position a year later (and interview again) and I said no thank you. I had just switched companies and was not going through that again anyway