You could, but sometimes the interviewer doesn't even know exactly why they are doing it. First, it's a natural tendency. If you want to find if somebody "know

You could, but sometimes the interviewer doesn't even know exactly why they are doing it. First, it's a natural tendency. If you want to find if somebody "knows" a particular subject, an inexperienced person would start asking for factoids and interpret every incorrect answer as the proof that they don't really know the subject. Second, many interviewers learn from other interviewers or just by trial and error, or from some courses, many of which have very dubious origins. There are many beliefs that are simply wrong, but still get circulated among interviewers, because nobody does 30 year careers in interviewing React programmers - wonder why...