[jasonm23]

To expect CRT/Williams Tube memory is a slightly bizarre assumption, it's a technology that was only very briefly used (developed in 1947 and used only in machines in the early 1950s, all but disappearing by 1956). It's also pretty much unheard of now.

While magnetic core memory was dominant from 1955 until around 1976, when silicon went mainstream. Machines with MCM were in general use for a long time after that too.

It's possible the interviewer confused the widespread use of CRT in pre-flat screen monitors. (Shrug, maybe CRT was very briefly mentioned? who knows?!)

Williams Tube memory is pretty interesting BTW. Worth taking a look at Selectron memory too. You know, for fun.