Which of the following is not true about polymorphism?

Correct Answer (Detailed Explanation is Below)

C. Increases overhead of function definition always

Detailed Explanation

Explanation:

Let’s check each option:

• (b) It is feature of OOP → ✅ True

• (c) Ease in readability of program → ✅ True (polymorphism makes code cleaner and more flexible)

• (a) Helps in redefining the same functionality → ✅ True (function overriding / overloading)

• (d) Increases overhead of function definition always → ❌ Not true

Polymorphism does not always increase overhead.

• Compile-time polymorphism (function overloading) has no runtime overhead.

• Runtime polymorphism (virtual functions) may have slight overhead due to dynamic binding, but not always.

In C++, both types exist:

• Compile-time polymorphism

• Runtime polymorphism

So the statement that it always increases overhead is incorrect.