Job Interviews Questions / Puzzles

Are you interested in what do "big" companies ask on their interview? Are there common elements among these questions? Is there a rule on how to be prepared and face an interview? The following links present some of the real experiences and questions posted during interviews at Google, Microsoft, Oracle, Apple, IBM, Amazon, HP... etc.
The cool think is that you find out opinions from the offer and benefits, too, offices, rules, schedule and all that.

http://www.glaak.com/interviews/

This second link is related to Job Interview questions but it presents several puzzles that were indeed presented as interview questions or test. Some of them are really challenging, I already know a few friends that will jump on solving the logical problems right away. Laur? Roxana?... you maniacs...

http://www.techinterview.org/