About Question enthuware.ocajp.i.v8.2.1481 :

[vsudakov]

Hello.

From explanation on the first option:

You cannot override a static method with a non-static method and vice-versa.

Static method can be hidden by instance method in inheritance of interfaces, isn't it?
For examples this is compiled well:

public interface I1 {
static void m1() { }
}

public interface I2 extends I1 {
default void m1(){ }
}

Thanks.

[admin]

Yes, a static method can be hidden. But not overridden.

[Splink]

There is a mistake in explanation to answer number one.
Instead of this:
interface I{
public default void valid(){ }
public static void invalid(){ }
}
interface I2 extends I{
public static void valid(){ }//this is ok
public default void invalid() { }//WILL NOT COMPILE
}
It should be like this:
interface I{
public default void valid(){ }
public static void invalid(){ }
}
interface I2 extends I{
public static void valid(){ }//WILL NOT COMPILE
public default void invalid() { }//this is ok
}

[admin]

You are right. Fixed.
thank you for your feedback!