This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
As Moguluri said, you've not shown us the code of Interface2 and Interface3. So the best guess is there is a getInfo() method in them too with maybe different exceptions in throws clause. But in any case, methods in interface don't have a body, so they are not called. There is only one getInfo() method which has a body, and that is in the OverRideOnMultiInterfaces class, so that will be called.