25 years ago I got a question like that, for an HPUX utility that only existed on hpux, and had an alphabet soup of command line options. I pushed back, saying no one would know that, you have look it up in the documentation. the come back, was, of course, when it’s borked, you can’t look it up, and you’d have to know it. I came back with the set of commands you’d need to get the system in a workable state, from any of the reasonable starting points (scratch install from tape, cd, or network, or recovering a hosed root fs,) and noting that the command they were asking about wasn’t actually required in any of them. I was not offered the job, but the guy in the interview who hadn’t asked the question gave me the name of another hiring manager, who did give me a job. i later learned there was a whole slew of stupid questions like that, whose real purpose was to sort out the people who knew hpux from the broader unix sysadmin pool. (HPUX had it’s own sucking features, and you did need to know a number of them in the environment, which were 5 and 6 nines systems.)