The ultimate step-by-step roadmap to cracking machine coding rounds. Pure Object-Oriented implementations.
Master Encapsulation, Abstraction, Inheritance, and Polymorphism. Learn clean class responsibilities.
Non-negotiable for SDE-2. Deep dive into SRP, OCP, LSP, ISP, and DIP. Problems solved with code.
Creational, Structural, and Behavioral patterns. Most LLD problems reduce to Strategy + Factory + Composition!