About Question enthuware.ocpjp.v7.2.1346 :

[RobynBackhouse]

The answer here is not conclusive.
The question asks:
What methods HAVE TO BE implemented for a class implementing both I1 and I2, not what methods CAN BE implemented.
The correct answer is given to be
public void m1() throws FileNotFoundException

I would argue that this is not necessarily correct however, as this does not actually have to be implemented.
A perfectly valid method implementation would be:
public void m1(){}
An empty subset of the exceptions is a valid subset, so although the one stated certainly CAN be implemented in this case, it does not actually HAVE to be, and that is what the question asks..

[admin]

You are right. The problem statement has now been updated to make it clearer.
thank you for your feedback!
-Paul.