I doubt it's common, but my friend had an experience where they kept trying to direct him towards specific technical topics of particular interest to the busine

I doubt it's common, but my friend had an experience where they kept trying to direct him towards specific technical topics of particular interest to the business. He worked for their competitor, but not in the capacity the interviewer was trying to delve into, so in addition to scummy, it was pointless and annoying. At some point my friend cut the interview off.