Bottom-Up Design Approach
Bottom up program design starts with the component parts and repeatedly combines them to achieve the general concept.
Advantage
Create robust, reusable low-level utilities then decide how they will be put together to create high-level construct.
Disadvantage
The complete program does not exist without the addition of the last module such that testing of system-level functions is not possible during development.
Example: Generating Quizzes
Basic Elements: Question Model, Difficulty Level, Topic Filters
Functional Module: Quiz Generation - selects questions based on specified criteria like difficulty level and topic.
Integration into Major Function: Quiz Engine - uses the Quiz Generation module to create quizzes, tracks user answers, and calculates scores.
Core Component Formation: The Quiz Engine is integrated with User Management and Results Analysis to form a comprehensive educational product.
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