C++ Virtual Functions Interview Question:

Do you know the use of Vtable?

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Vtables are used for virtual functions. Its a shortform for Virtual Function Table.

It's a static table created by the compiler. Compiler creates a static table per class and the data consists on pointers to the virtual function definitions. They are automatically initialised by the compiler's constructor code.

Since virtual function pointers are stored in each instance, the compiler is
enabled to call the correct vrtual function at runtime.
Submitted by: Administrator