Which model assumes that systems are created from reusable components, scripting or database programming ? 

The correct answer is option 1: An application-composition model

Key Points

• Application-Composition Model is based on the concept of building systems by integrating pre-existing reusable components.
• It is commonly applied in environments involving:
  • Scripting languages (e.g., Python, JavaScript)
  • Database programming
  • Graphical user interfaces (GUIs)
• This model helps reduce development time by reusing well-tested modules and APIs.

Additional Information

• Post-architecture model: Deals with detailed system design and implementation after the overall architecture is defined.
• Reuse model: Focuses on identifying and adapting reusable components, but doesn't specifically emphasize scripting or database-driven integration.
• Early design model: Used in the early stages of system development to define high-level architecture, not actual component composition.

Hence, the correct answer is: option 1: An application-composition model