Question

In object-oriented programming, which of the following is true about "Polymorphism"?

• A. It allows objects of different classes to be treated as objects of a common superclass
• B. It refers to the ability of a class to inherit properties from more than one class
• C. It refers to the ability to define a function with the same name but different signatures
• D. It allows data to be encapsulated in the class

Hint:

To understand polymorphism:
- Focus on treating different classes as a common type.
- Practice with method overriding in inheritance.
- Distinguish from overloading (same name, different parameters).

Answer 1

The Correct Option is A

To determine the correct definition of polymorphism in object-oriented programming, we need to evaluate each option against the concept's meaning.
Step 1: Understand Polymorphism
Polymorphism allows objects of different classes to be treated as objects of a common superclass, enabling a single interface to represent different underlying forms (e.g., method overriding or interfaces).
Step 2: Analyze Option A - It allows objects of different classes to be treated as objects of a common superclass
This is the core definition of polymorphism, where objects of derived classes can be handled as instances of a base class, often through method overriding.
Thus, option A is correct.
Step 3: Analyze Option B - It refers to the ability of a class to inherit properties from more than one class
This describes multiple inheritance, not polymorphism.
While related to OOP, it is a distinct concept.
Thus, option B is incorrect.
Step 4: Analyze Option C - It refers to the ability to define a function with the same name but different signatures
This describes function overloading, a form of compile-time polymorphism, but not the broader definition of runtime polymorphism (e.g., method overriding).
Thus, option C is partially correct but not the best answer.
Step 5: Analyze Option D - It allows data to be encapsulated in the class
This refers to encapsulation, another OOP principle, not polymorphism.
Thus, option D is incorrect.
Step 6: Conclusion
The most accurate and comprehensive definition of polymorphism is option A, focusing on the treatment of objects under a common superclass.