Where can I find a list of beginner questions that are asked on Stack Overflow?

Sorry but SO doesnt keep a list of any FAQ.

You can go to http://stackoverflow.com/search?q=##### replacing hash by keyword of your search to get the related questions.

OR

Just google the question. SO link will appear if it exists.

Puzzles related to increment/decrement operators are extremely common, and a basic Google search like "Increment+Decrement+Operator+Puzzle+Stack Overflow+<Language Name>+Explanation" will do the trick.