Do interfaces solve the deadly diamond of death problem?
I don\'t think so, for example:
// A class implementing two interfaces Interface1 and Interf
No, you don't. Interfaces don't have any variables, other than static final ones.
If you actually write, compile, and execute those interfaces and classes you'll have your answer. That x variable is not a class member, so there's no ambiguity.
This is one of those questions that you can easily answer for yourself by writing the code and letting the JDK tell you. It'll be faster than asking here.