My understanding is that at Apple this can vary quite a lot in difficulty or depth depending on what team you're looking at, and who is interviewing you.
I know its Apple but I'd definitely be prepared to walk out. In that situation that gives you the freedom to clarify the job description -- if they say it is in the description, I'd save everyone time and say I don't have that knowledge, thank them for their time, and wish them luck on their next n months of searching for their unicorn.
If it isn't, I'd probably go full stick-in-the-mud and explain that I could find the answers to those questions but it would be a waste of everyone's time: I'm an A player and I don't focus on irrelevant things that dilute abilities and ultimately the product (basically throw Steve Jobs at them).
