Object-Oriented Programming (OOP) Roadmap for System Design
OOP Roadmap for System Design
Classes & Objects
Blueprints vs instances. Constructors, attributes, methods, and object lifecycle.
- →Constructor
- →Instance
- →State
Encapsulation
Hide internal state behind well-defined interfaces. Access modifiers: public, private, protected.
- →ACCESS CONTROL
- →GETTERS/SETTERS
Inheritance
Extend and reuse behavior. Single vs multiple inheritance. Method overriding. Super calls.
- →IS-A
- →EXTENDS
- →OVERRIDE
Polymorphism
Same interface, many implementations. Method overloading vs overriding. Runtime dispatch.
- →RUNTIME
- → OVERLOAD
- →DUCK TYPING
Abstraction
Expose only necessary complexity. Abstract classes vs interfaces. Contract-based design.
- →INTERFACE
- → ABSTRACT
- →CONTRACT