There are really only a couple of uses for trivia questions in technical interviews: verifying someone's resume (i.e. if you claim to be skilled in some area, trivia questions should be, well, trivial) and as a jumping-off point for a discussion to see how you think.

So handle it the same way as you would in your day-to-day work: ask questions, try to figure it out.

If they really are just interested in your rote memorisation of documentation, consider that this might not be such a great place to work.

If you used something 5 years ago, sure you can't remember the fine details, nobody expects that. But you should still be able to discuss the technology intelligently. Even if the details are gone the concepts should still be there, and fluency in concepts is what a good technical interview will be about.