OOPs Concepts Programming and Technical Programming Definition

RunTime Polymorphism is achieved by ______

-friend function
-virtual function
-operator overloading
-function overloading

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OOPs Concepts Other Question

To perform stream I/O with disk files in C++, you should

-open and close files as in procedural languages.
-use classes derived from ios.
-use C language library functions to read and write data.
-include the IOSTREAM.H header file.
In dynamic binding the code matching the object under current reference will be called at.

-Compile time
-Run time
-Editing time
-Binding time