About 0Y interfaces

["Alex R. Mosteo" <devnull@mailinator.com>]

Hi,

I hope someone can clarify some aspects of interfaces to me. I've read 
the description in several places but there are some things I'm not sure 
about.

Firstly, interfaces are purely abstract, right? There's no way to 
provide a default/partial implementation except creating an object type 
which implements that interface.

Secondly, we can create an object type which implements two or more 
interfaces. But I guess there's no multiple inheritance from classes, so 
you couldn't use two implementations of two different interfaces 
directly when creating a new type. Is this right? You'd need to use, for 
example, member objects and use proxy calls.

I think I'm not forgetting anything. Thanks in advance,

Alex.