Computer Science · Theme B: Computational thinking and problem-solving

B3.2 — Fundamentals of OOP for multiple classes

Computer Science · SL / HL · syllabus-mapped notes

1. CS_B3.2.1

   Inheritance for code reusability

   Parent and child class hierarchies, and access to parent members under four modifiers.

2. CS_B3.2.2

   Modelling polymorphism

   Dynamic polymorphism via method overriding, and static polymorphism for efficiency.

3. CS_B3.2.3

   Abstraction and abstract classes

   Exposing essentials for modular code, and abstract classes as common interfaces.

4. CS_B3.2.4

   Composition and aggregation

   Building objects from components, and how the two has-a relationships differ.

5. CS_B3.2.5

   Common design patterns

   Singleton, factory and observer, and the recurring problems they solve.