“DCOM COM frequently Asked Questions by expert members with experience in COM DCOM. So get preparation for the DCOM COM job interview”
An object that implements the IMoniker interface. A moniker
acts as a name that uniquely identifies a COM object. In
the same way that a path identifies a file in the file
system, a moniker identifies a COM object in the directory
namespace.
COM (Component Object Model) technology in the Microsoft
Windows-family of Operating Systems enables software
components to communicate. COM is used by developers to
create re-usable software components, link components
together to build applications, and take advantage of
Windows services.
For the first question, Yes, we can since the QueryInterface
() rules of thumb suggest that if we can query an interface
of C from B, we should be able to query the viceversa.
The IUnknown implementation of both the objects has to do
the 'magic'.
For the second question, Aggregation bounds outer and inner
objects together and gives the user the interface pointers
of either objects to access it directly so that the user
never knows the objects are aggregated.
But when containment is used, the interface of inner object
never exposed to the client directly rather the outer
object receives the calls and forwards internally. Here
also, the user doesn't know the objects are contained.
In-proc server is a COM component, when instance is the
server is loaded into the caller process space. In-Proc
server can be easily identified by .dll extension.
Out-of-Proc server is a COM component that run in its own
process space and for any instances created by the users, a
proxy is created within the users process space. Proxy is
responsible for interacting with the server to carry out
operation on behalf of the client. (.exe extension).
OLE is a set of technologies to support linking and
embedding. COM lies in OLE as one of the technologies. COM
defines a binary standard / set of rules for developing
reusable components.
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