What should QueryInterface functions do if requested object was not found?

1 Answers  

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Do COM keep track of all the object references(Accounting)?

3 Answers   Microsoft,

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How does a DCOM component know where to instantiate itself?

1 Answers  

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How can would you create an instance of the object in COM

2 Answers  

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Once I have developed the com wrapper do I have to still register the com in registry?

0 Answers  

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what is oops

11 Answers   Accenture,

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How do you make a NET component talk to a COM component?

3 Answers   TCS,

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Can I use .net components from com programs?

0 Answers  

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Differentiate normal DLL to COM DLL

7 Answers   Talisma,

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What happens when client calls CoCreateInstance?

2 Answers   Cap Gemini,

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Let?s assume we have object B and aggregated object C (in- proc server), created by B. Can you access any interface of B from C? What?s the difference between aggregated and contained objects?

3 Answers  

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What is IUnknown? What methods are provided by IUnknown?

3 Answers   IBM,

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