Need to know what are the supported extension type ( say .txt or .ppt ). Wanted to know all the supported types. This is with respect to core APIs
Dropbox doesnt go by extensions, it just syncs everything in the Dropbox folder.
That's correct, the same goes on the API too. The Dropbox API will sync whatever files you give it regardless of file type. The only exception is if you registered an app with the file type permission, in which case it will be restricted to whatever groups you selected, as documented here:
https://www.dropbox.com/developers/reference/devguide#app-permissions