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Old 5th October 2012, 11:03 AM
palwindersingh.1
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Default Interview questions in com DCOM

Hello sir, I want to know information about the interview question of com DCOM so you give me information how I can gate these questions and also give me some information about the com and DCOM.
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Old 5th October 2012, 03:45 PM
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Join Date: May 2012
Default Re: Interview questions in com DCOM

Here I have mentioned some questions for you which are mostly asked in the Interview of com DCOM

What is the base class of all COM class? Define its prototype.
What is the definition of IDispatch?
Does AddRef() is called by client?
What is ID binding? What is the utility of GetIDsofName() function in IDispatch()?
What are the entry and exit point routine of COM DLL module?
What are the output of MIDL compilation of an IDL file?
What is a wrapper class?
What is Marshalling in COM?
Why out parameters are always pointer to pointer?
How a COM DLL can provide self-registration and deregistration?
What is the utility of CreateInstance() function in IClassFactory?
What is proxy/stub scheleton in COM client and server programming?
What is the utility of QueryInterface() function in IUnknown interface?
How BSTRs are allocated and deallocated?
Who allocates memory for a COM object and where its construction get called?
What is the difference between a COM server written solely in C++ (no IDL) and using C++ and IDL?
What is HRESULT? Why all function is COM returns HRESULT? How do we come to know the function returns a success or failure? If failure what is the reson behind? How function returns a logical value?
What is a co-class in a COM server?
What is the definition of a IClassFactory interface?
How Invoke() method is called using Automation?
What is a factory class?
What is BSTR? How it differs from an array of unicode wchar_t?
How can I add some help/guide line string in the definition of a method to help client to understand the functionality of the method?
Who frees OUT parameters?
How can I convert ASCII string to BSTR using ATL framework and Win32 APIs?
What are the advantages of interface based programming?
What is [in], [out], [in,out] and [out,retval] parameters?
How can I define a Interface?
How can I implement a wrapper class?
What is InProc (In Process) and Out-Of-Process COM server?
What is CLSID, GUID, UUID, APPID ? How it is determined?
What is Interface Definition Language or IDL?
What is the utility of AddRef() and Release() function?
How IDispatch supports VB, JAVA, script enabled object?
What is Object Definition Language?
How do I define a method in an interface using IDL?
What is the utility of LockServer()?
How can I write an Interface that supports type info?
What is TypeLibrary?
What is smart pointer? What is the advantages of using it? How can I generate smart pointer classes from a COM server? What are the file names smart pointers are defined and where those are implemented?
Write steps to create a com client?
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