RPN (Reverse Polish Notation) is a mathematical notation wherein every operator follows all of its operands, which was designed to reduce computer memory access and utilize the stack to evaluate expressions. The syntax looks like: A typical interview question would be to implement a RPN calculator since it is simple enough to resolve in less than…

Edit, 6/26/2012: This post is my personal rant about interview questions. If you got here looking for actual programming interview questions, I can recommend these books: Cracking the Coding Interview and Programming Interviews Exposed. These books helped many engineers getting their dream jobs. It’s no secret I’ve been in a bunch of of interviews…