OK, maybe not all 50, but answering a few may help you better understand the people on your pages. And they certainly help place them in real worlds.

50 Job Interview Questions You Should Be Prepared to Answer http://zite.to/LBq2GI

Intended to help employers find the kinds of people they want to hire, these questions could be handy to unlock the personalities of your fictional characters.
You might even consider using some in interviews for non-fiction. Develop some “signature” questions akin to Barbara Walter’s old “What kind of tree are you?”

25 Wacky Interview Questions That Work

http://www.entrepreneur.com/article/230931

Six Pieces of Bad Advice New Writers Need to Ignore http://zite.to/1dH8xkp