$6\mathrm{.}3$ Program Design

Appropriate choice of data structures that serves the purpose of the application. Class designs that adhere to the SOLID principles.

$$ You are required to follow MVC pattern to connect the frontend with the backend.

$$ You are required to use one of design patterns such as Singleton pattern, besides the MVC

pattern.

$$ You are required to implement at least one interface or abstract class to demonstrate your understanding of OO principles.

$$ You are required to apply SOLID principles when appropriate in order to enhance the maintainability and extensibility of your program, decrease coupling amongst classes, and minimize code repetition across classes.

$$ You are required to choose appropriate data structures to enhance the running efficiency of the program.