About Question enthuware.ocpjp.v8.2.1829 :

[admin]

a child interface can override a static method with default

Please read my post above again. The word "override" is not applicable in this situation but yes, it can have a method with the same signature. This is not a case of "override" though.

but NOT default method with static..

Correct.

You need to understand that the word "override" has a specific meaning in Java and OOP (google). Merely having a method with the same signature in parent and sub class/interface does not necessarily involve "overriding".

And a child interface cannot access parent's static methods.

It can; using the name of the parent class/interface. If I2 extends I1, you can call I1.staticMethod(); from inside I2. But you cannot invoke it directly without the name (unlike in case of a class, where you can).

a child class does not "override" static methods because it doesn't technically inherit it, but can access it's ancestors' static methods.

Correct.

A class cannot override an inherited (from an interface) default method with a static.

Correct.

You should try out some test programs to verify and to make sure you remember the rules. There are questions in the exam on this type of thing.
HTH,
Paul.

[lenalena]

Thanks, Paul,

I did write test programs, and I'm just trying to generalize and confirm what they showed.

Thank you for taking the time to go through it.

Also, a class cannot invoke the implemented interface's static method directly, has to call it through interface's name. So it's not about who does the calling, it's about who declares the static method. Interface's static methods cannot be accessed directly, while a class' can...

On the side note, is there a logical reason why a class' static method can be accessed by children while an interface's cannot? Is it because there is no implied "super" reference to an implemented/extended interface?

[admin]

On the side note, is there a logical reason why a class' static method can be accessed by children while an interface's cannot? Is it because there is no implied "super" reference to an implemented/extended interface?

I haven't come across any valid reason for why a class' static method can be accessed by children directly. It should not have been able to and is a design flaw in the language, IMHO. I just made this argument here: https://coderanch.com/t/680085/certific ... ce#3189912

HTH,
Paul.