Question

What is a virtual function table?

a.

A table that is created at runtime to determine which particular method is called when an overloaded base-class method is invoked.

b.

A table that is created at compile time for classes that define virtual functions and for descendant classes that provide overloaded implementations of virtual functions defined in other classes.

c.

A table that is used to find the correct function when someone calls into one of the virtual methods.

d.

A table that contains hard-coded pointers to all virtual function implementations within a specific class.

Posted under Reverse Engineering

Answer: (b).A table that is created at compile time for classes that define virtual functions and for descendant classes that provide overloaded implementations of virtual functions defined in other classes. Explanation:Compilers implement the virtual function mechanism by use of a virtual function table, which is created at compile time for classes that define virtual functions and for descendant classes that provide overloaded implementations of virtual functions defined in other classes.

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