Allowing different derived classes to be used interchangeably through the interface provided by a common base class is called ______.
Run time polymorphism
Polymorphism lets one interface stand for many forms. When objects of several derived classes are handled through a base-class pointer or reference and the overridden (virtual) method that runs is chosen from the object’s actual type during execution, the mechanism is dynamic dispatch, also called late binding.
Because the choice of which derived-class method to execute is made while the program runs, using the common base-class interface interchangeably for all derived classes is run time polymorphism (subtype polymorphism).
Compile time polymorphism and static polymorphism are the same idea under two names: function and operator overloading or templates, resolved by the compiler before execution, so they do not let derived objects be swapped behind a base interface. Derived polymorphism is not a standard term.
Run time polymorphism option is correct.
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Codes :
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(a) A publicly derived class is a subtype of its base class.
(b) Inheritance provides for code reuse.
Which one of the following statements is correct ?
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Important Questions from OOPs concept
Which statements is correct regarding main () function in C++?
I. It is a user defined function.
II. It is a pre-defined function.
Consider the following segment of C++ code.
int j, n;
for(j=1;j<=n; )
j=j*2;
What is the number of comparisons made in the execution of the loop for any n > 0?
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Statement (I): The friend function and the member functions of a friend class directly access the private and protected data.
Statement (II): The friend function can access the private data through the member functions of the base class
In the light of the above statements, choose the most appropriate answer from the options given below:
If a constructor 'Date' is declared explicitly and has to be defined outside the class, which of the following is correct?
Which of the following statements is TRUE ?
