If an object does not support a requested interface, QueryInterface returns:

Which statement is wrong about the benefits of type libraires ?

What is the mechanism used in COM to uniquely identify components ?

Following are some statements regarding interfaces. Which is the only incorrect one ?

Point out the incorrect statement regarding proxies :

The number of methods in the IUnknown interface is :

Which interface must be supported by a COM object ?

Which one is not a feature of COM ?

How many different kinds of interfaces are there in COM?

Which languages/tools can interact with COM through dispatch interfaces ?

How many bytes is a GUID ?