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Component Object Model Basics - Quiz

Each question is worth one point. Select the best answer or answers for each question.
 
1. What is a COM interface?
Please select the best answer.
  A. A group of related methods
  B. A fancy name for a C++ object
  C. A serial access mechanism to support persistence data

2. What is a requirement for all COM interfaces?
Please select the best answer.
  A. They must be written in C++
  B. They are required to allow access from Java
  C. They are required to implement methods to support interface navigation and lifetime management

3. Which of the following does a COM object contain or implement?
Please select the best answer.
  A. The CreateCOMObject method to create instances of itself
  B. The IClassFactory interface to create instances of itself
  C. One or more COM interfaces

4. What is a COM server?
Please select the best answer.
  A. A DLL or EXE that contains one or more COM objects
  B. A virtual device driver installed in the COM subsystem
  C. A DLL that supports the CreateCOMObject method to create COM objects

5. Who creates a COM object?
Please select the best answer.
  A. A client calling the CreateCOMObject library function
  B. By a class object that is normally a class factory
  C. By IUnknown

6. When are COM objects normally created?
Please select the best answer.
  A. When a client asks COM for a class factory associated with a COM object. Using the class factory, clients create instances of COM objects.
  B. COM precreates all COM objects, caching them until a client request comes in.
  C. When a user clicks a control, invoking inside-out activation.

7. How do clients access COM objects?
Please select the best answer.
  A. Through public data members because the object is usually implemented in C++
  B. Through the servers' implementation of Invoke
  C. Through the object's interfaces
Correct answers:

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