Is Facebook Markup Language used to create applications?

What does this query do? SELECT uid, name, pic_square FROM user WHERE uid = me() OR uid IN (SELECT uid2 FROM friend WHERE uid1 = me())

What are the three different ways of implementing the 'Like' button?

What is the function of "Open Graph"?

In the Ads API, which Graph API Queries are available?

True or False? The time stamp on Facebook pages are in UNIX format.

The sig parameter passed to the authentication method is a md4 hash of the current request and your secret key.

Users can leave questions and reviews on your application page.

Error code 103 indicates that....

Desktop applications must use which protocol when executing the auth.createToken method?

Which FQL statement example is most likely to return the user's friends who are also subscribed to your application?