Object-Oriented Programming for MAANG Interviews

A book-shaped table of contents for OOP: paradigm foundations, the four pillars, object relationships, SOLID/GRASP design principles, memory and runtime internals, GoF design patterns, language-specific OOP, and OOP at system scale — cross-linking existing pattern, concurrency, and low-level-design notes instead of duplicating them.

1 — Java OOP

Tours Object Model, JVM, Interfaces, Default Methods, Records, and Sealed Classes as the core sub-topics of java oop.

2 — C# OOP

Tours Properties, Delegates, Events, Records, Extension Methods, and Partial Classes as the core sub-topics of c# oop.

4 — Python OOP

Tours Duck Typing, Multiple Inheritance, Mixins, and Metaclasses as the core sub-topics of python oop.

5 — JavaScript & TypeScript OOP

Tours Prototype Chain, Classes, Mixins, and Decorators as the core sub-topics of javascript & typescript oop.