Google recruiters send people to Steve Yegg's stuff, which includes links to interview questions (including ones they actually use)
They also tell you to do TopCoder questions, which are also pretty close to the real thing.
Facebook also has their "Puzzles" page, which contains similar information: http://www.facebook.com/careers/#!/careers/puzzles.php
The truth is that with hard-core technical interview questions you can either do them or you can't. They aren't trick questions, just tests of what you can do.
Google recruiters send people to Steve Yegg's stuff, which includes links to interview questions (including ones they actually use)
They also tell you to do TopCoder questions, which are also pretty close to the real thing.
Facebook also has their "Puzzles" page, which contains similar information: http://www.facebook.com/careers/#!/careers/puzzles.php
The truth is that with hard-core technical interview questions you can either do them or you can't. They aren't trick questions, just tests of what you can do.