Rapid application development: in typical prototyping projects, which toolset or language class is commonly used to build quick, interactive mockups?

Introduction / Context:
Prototyping emphasizes speed and user feedback to reduce requirements risk. Tools that accelerate UI building, data binding, and logic stubs enable rapid iterations.

Given Data / Assumptions:

• Goal: quickly demonstrate behavior to users for validation.
• High productivity and flexibility matter more than early optimization.
• Artifacts may later be hardened or rewritten for production.

Concept / Approach:
Fourth-generation languages (4GLs) and RAD tools provide declarative forms, report writers, visual designers, and high-level data access. They shorten the path from idea to interactive model, which is why they are favored in prototyping.

Step-by-Step Solution:

Verification / Alternative check:
Case studies show reduced rework when user feedback is captured early via working prototypes.

Why Other Options Are Wrong:
COBOL or assembly are inefficient for fast iteration; documentation alone cannot validate usability.

Common Pitfalls:
Mistaking a prototype for production without refactoring; always assess non-functional requirements before go-live.

Final Answer:
Fourth-generation languages (4GLs), RAD tools, or visual builders to iterate quickly with users