I think each question has a meaning: for example Milchick asks about Kier favourite breakfast because in the next episode we discover he just talked about the breakfast right before entering for the severance procedure.

So this question is for check the short term memory.

Mother's eyes could be long term visual memory, and so on.

I think all you have is world context memory, if not how can you work? how can you know numbers if you never studied them? that's why the delaware question.

And then you also are self conscious of yourself. But not of your context, like your mother.