Answers were Sorted based on User's Feedback
Answer / chandrasekharreddy siddamreddy
Open the dll in dependency walker application
(depends.exe). If the dll is having following functions
It is a COM DLL otherwise it is not.
|Is This Answer Correct ?||13 Yes||1 No|
Answer / virat sarswat
Checking above listed four function is a option. Another
one is just try to egister dll using "Regsvr32" if it's a
com dll it will register otherwise it will prompt error for
|Is This Answer Correct ?||4 Yes||0 No|
Answer / techy break
second answer is correct, checking dll not means, checking
in source code.So IUnKnowns pointer checking no
possible.Simply check using dependancy walker as in 2
|Is This Answer Correct ?||1 Yes||0 No|
Answer / sandeep mishra
COM DLLs export above listed 4 functions and it's mandatory
for any DLL to be qualified as a COM DLL.
Where in regular DLLs we get a list of exported functions
which from client application we will invoke.
|Is This Answer Correct ?||0 Yes||0 No|
Answer / bijender singh
COM Dll contails IUnknown interface but general DLL doesn't.
|Is This Answer Correct ?||2 Yes||4 No|
Futures of COM
When you call CoInitialize(NULL) function how it works internally.
C is aggregated by B, which in turn aggregated by A. Our client requested C. What will happen?
Write a JCL to copy only selected members from a partitioned data set to another partitioned data set. (Use: IEBCOPY)
What are the different compatibility types when we create a COM component?
How to Use structs in COM interfaces when Automation compatibility is not an issue?
Which namespace do the classes, allowing you to support COM functionality, are located?
Explain queued components.
How does a DCOM component know where to instantiate itself?
Differentiate normal DLL to COM DLL
hi,I have applied for NIC test plz if any one have test paper pattrn plz send me on "email@example.com"
can a COM interface be implemented by more than one COM class in the same COM component?