If you really ask questions like that then you shouldn't be allowed to be involved in recruiting.

Why?

What type of questions do you mean?

Imagine a cottage with all 4 walls facing south. And there is a bear visiting it. What is the color of bear's fur?

The second you uttered that, I'd thank you for your time and walk out.

What on earth does that have to do with building (actually, in most cases, maintaining) a CRUD web app?

What does that have to do with n-tier web application architecture?

Is that a real question? I too would refuse that in a programmer interview, unless it was joke. Of course the answer is white - polar bear and you are at the north pole. Even as a puzzle question it's pretty lame. Still puzzling over the boiling bagels on Mars one...