A first or early model of a product that allows you to test assumptions before developing a final version.

• A. Algorithm
• B. Prototype
• C. System
• D. Circuit

Answer: (B)

Testing ideas with an early, rough version helps you see what works and what doesn’t before locking in a final plan. That early model is a prototype. It’s built specifically to test assumptions—like whether a feature is useful, how users will interact with it, and whether the concept can be built with the intended technology. Prototyping lets you learn quickly, gather feedback, and iterate to improve the design, often saving time and money in the long run. An algorithm is a set of instructions for solving a problem, not a tangible model of a product. A system refers to how parts fit together in a broader setup, which isn’t necessarily an initial test version. A circuit is an electrical arrangement, relevant to hardware but not the general idea of testing a product early. So the best choice is prototype.