Introduction
Object-oriented programming (OOP) is one of the most important topics in IB Computer Science. It’s a core part of the syllabus and a common feature of both Paper 1 and the IA. OOP can seem intimidating at first, but with the right study strategies, you can master its concepts and confidently apply them in exams and projects.
In this guide, we’ll break down what OOP means in the IB context, which concepts matter most, and how to revise them effectively.
Quick Start Checklist
To study OOP effectively for IB Computer Science, you should:
- Understand the four main OOP principles: encapsulation, abstraction, inheritance, and polymorphism.
- Practice designing classes, attributes, and methods.
- Study both theory and practical coding examples.
- Link OOP to your IA project if possible.
- Use pseudocode to practice exam-style applications.
Core OOP Concepts to Master
1. Encapsulation
- Bundling data (attributes) and methods into a class.
- Example: A
Studentclass that stores name and grade, with methods to update scores.
2. Abstraction
- Hiding unnecessary details and exposing only what’s needed.
- Example: A
Carclass might have adrive()method without exposing how the engine works internally.
3. Inheritance
- Creating new classes based on existing ones.
