Only done 1 interview in the UK and a couple in Oz. You are expected to know the general info about the type you are currently flying. Of course, if you can remember the details about a previous type, esp if that type is more relevant to the job you are going for then great. You've got the basics right, engines/props/ number of the said items, etc is a good start. In many cases it's worth knowing that your answer itself isn't judged but how you answered the question. eg, "I can't remember as I flew that type X number of years ago, however, I have the details here" (in bag/brief case. "I can't remember but I have a summary sheet at home that I would use to refresh my memory"
Where many people fall down IMHO is that they waffle and dig themselves into a hole. Not a good position to be in.