An interviewer proposes this scenario: There is a school bus full of ping pong balls, all the way to the ceiling, filled from back to front. You are asked to estimate the number of ping pong balls while explaining your line of thinking. Questions are welcome--and answered if on the fact sheet.

Explaining your abstract, critical thinking process seems much more valuable. HR screens someone for having the degree, assume they are familiar with all the facts (they can use Stack Overflow when they get in). Just learn how they think and how they communicate.