The point I was trying to highlight is that "instrumental interviews" rely on the interviewee having seen and practiced the exact problems being tested before e

The point I was trying to highlight is that "instrumental interviews" rely on the interviewee having seen and practiced the exact problems being tested before ever entering the interview room. It's a fundamentally different thing being tested from coding interviews, where the candidate won't even know the "genre" they're being tested on, let alone have spent time with the questions beforehand.