Explain polymorphism as if you were talking to someone with no technical experience. Which analogy is used?

• A. A memory management technique.
• B. A universal remote that can control your TV, sound system, and lights.
• C. A database index.
• D. An inheritance mechanism.

Answer: (B)

Polymorphism means using one interface to interact with many different things, where each thing does its own version of the action. The universal remote analogy nails this idea: one remote can control a TV, a sound system, or lights. You press a button like “power” or “play,” and the same basic command is sent, but each device interprets and responds in its own way. You don’t need to know how each device works inside; you just rely on the common remote to signal it.

This analogy helps you see why polymorphism is powerful: you can swap in new devices without changing how you interact with them. The same commands work across different objects, yet each object handles the command in a way that's appropriate for itself. In programming terms, you define a common interface or set of operations, and different classes provide their own implementation.

Other options don’t capture this interaction as well. A memory management technique is about how a program handles memory, not about using a single interface across different behaviors. A database index is about speeding up searches, not about interacting with different types through one interface. An inheritance mechanism is related to how polymorphism is achieved, but the remote analogy directly conveys the idea of one control surface driving different, type-specific behavior.