The IUnknown interface lets clients get pointers to other interfaces on a given object through the QueryInterface method, and manage the existence of the object through the IUnknown::AddRef and IUnknown::Release methods.
IUnknown methods can be used to switch between interfaces on an object, add references, and release objects.
You must implement IUnknown as part of every interface.
What is virtual constructor?
Can you please explain the difference between copy constructor and an assignment operator?
Tell me what are the restrictions apply to constructors and destructors?
What is deep copy?
What is shallow?
Can you please explain the order in which constructors are called when an object of a derived class is created?
Which of the following statement is correct about constructors? A. A constructor has a return type. B. A constructor cannot contain a function call. C. A constructor has no return type. D. A constructor has a void return type.
To ensure that every object in the array receives a destructor call, always delete memory allocated as an array with operator __________ . A. destructor B. delete C. delete[] D. kill[] E. free[]
Which of the following gets called when an object is being created? A. constructor B. virtual function C. destructor D. main
Which of the following statement is correct whenever an object goes out of scope? A. The default constructor of the object is called. B. The parameterized destructor is called. C. The default destructor of the object is called. D. None of the above.
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