What two questions should you ask to determine a class's responsibilities?

In object-oriented programming, a class is a design element used to define an object's behavior and attributes. We use classes to group related functions and data together. A class's responsibilities refer to what functionality a class should provide, or what it should "know" and "do". These responsibilities should allow a class to fulfil its role within the overall program.

To determine a class's responsibilities, you should ask the following two questions: 1. What should this class "know"? Answering this question will help you identify the data and information the class should store, also known as the class's attributes. These attributes represent the state of an object created from the class. Examples of attributes include a user's name, an item's price, or an animal's age. 2. What should this class "do"? Answering this question will help you determine the methods (functions) the class should have. These methods represent the actions or behaviors the class should provide, usually related to manipulating or interacting with the object's state. Examples of methods include calculating a user's age, applying a discount to an item's price, or making an animal move. By asking and answering these two questions, you'll ensure that your class is designed with a clear purpose, ensuring it fulfils its role and responsibilities within the overall program effectively.