I still use a Yamaha Clavinova that I got in the early 90's...it has a floppy disc drive that still works for recording midi and is extremely convenient. Why such a feature with auto record didn't become a standard feature when SD cards came out is unfortunate.
Most (all?) of the cheap online retailers allow to (some require to!) enter a PD value and also provide instructions on how to measure it. I personally use https://www.goggles4u.com/, they are cheap but not quick since they probably order from China.
I am about that age (that I guess the OP is) where, luckily for me, I have created a curriculum and experience that will be wasted solving brain teasers.
Haven't interviewed in a good while (at least not from the interviewed side), but if the interview consists of 'how much orange juice is consumed in the US per day' kind of questions, I'd probably excuse myself, thank everyone for their time and look for greener pastures elsewhere.