Hi imr2k1,
In general, Windows Store App is only the client app, if you need a place for saving questions and even save some user profile/information, a server is necessary.
Not sure if Xbox live service provide such help, but you could ask at the forum:
http://www.xbox.com/en-US/FORUMS
Azure might be a good option for you:
http://www.windowsazure.com/en-us/
--James
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Thanks
MSDN Community Support
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