Introduction

The AP Computer Science A exam includes four main types of Free Response Questions (FRQs):

  • Methods and Control Structures
  • Class
  • Array/ArrayList
  • 2D Array

Today, our focus is on attacking the Classes FRQ, which tests your understanding of object-oriented programming (OOP) concepts. This includes:

  • Creating and manipulating classes
  • Writing constructors
  • Managing instance variables
  • Implementing methods
  • Understanding how objects interact in Java

Getting the first 4 points on ANY Classes FRQ

The key for tackling any classes frq, even if you don’t know how to solve the problem, is to have the right

  1. Instance Variables
    • Attributes of an object (e.g., name, age).
  2. Constructors
    • Initialize objects and set instance variables.
  3. Methods
    • Getters/Setters: Access and alter instance variables.
    • Perform actions or computations related to the object.

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Remembering to use the proper names, types, and encapsulations are key to getting these 4 points EASILY. Trystan will cover these in more detail in the prompt.