That's a signal you can more easily get from a practice interview. In a real interview, you have no idea why you were rejected.
Maybe you don't present well. Maybe you present perfectly well, but somebody else had slightly more experience dealing with a specific problem the company needs solved. Maybe they already decided to hire somebody, but needed to conduct interviews anyway to satisfy the lawyers.
Is there a good way to extract that information out of an interview? I always ask for feedback, but I rarely get it.
Maybe you don't present well. Maybe you present perfectly well, but somebody else had slightly more experience dealing with a specific problem the company needs solved. Maybe they already decided to hire somebody, but needed to conduct interviews anyway to satisfy the lawyers.
Is there a good way to extract that information out of an interview? I always ask for feedback, but I rarely get it.