You have a requirement: "A library system needs to manage books and members." Which class should be the main focus to represent the core entity?
Think about what represents the whole system managing books and members.
The 'Library' class represents the system managing books and members, so it is the main focus.
Given the requirement: "The system should allow customers to place orders for products." Which set of classes best represents the core entities?
Focus on who places orders and what is ordered.
Customers place Orders for Products, so these classes represent the core entities.
For a ride-sharing app that must handle millions of users and rides, which class design best supports scalability?
Consider all entities needed to support features and scale.
Option A includes all relevant classes to handle users, rides, vehicles, locations, payments, and ratings, supporting scalability.
Which class design shows a tradeoff between simplicity and detailed representation?
More classes mean more detail but more complexity.
Option A balances detailed representation with complexity by including payment, invoice, and cancellation policy classes.
Estimate the minimum number of classes needed to represent a social media platform with users, posts, comments, likes, and messages.
Think about one class per main entity mentioned.
Users, Posts, Comments, Likes, and Messages each need a class, totaling 5 classes.