OOPs Concepts Programming and Technical undefined

Keywords support dynamic method of resolution is

-abstract
-Virtual
-Dynamic
-Typeid

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OOPs Concepts Other Question

Which one is correct to declare an interface in a class?

-By making all the methods pure virtual in a class
-By making all the methods abstract using the keyword abstract in a class
-By declaring the class as interface with the keyword interface
-It is not possible to create interface class in C++
Which pointer is implicit pointer passed as the first argument for non-static member functions?

-self pointer
-std::auto_ptr pointer
-Myself pointer
-this pointer