Low-Level Design for MAANG Interviews

A book-shaped table of contents for LLD interview prep: OOP fundamentals through SOLID, design principles, UML, design patterns, dependency management, reliability, concurrency, domain modeling, API design, testing, refactoring, classic interview problems, advanced architecture, and performance — cross-linking Object-Oriented Programming and Patterns instead of duplicating them.

1 — Dependency Injection

Compares constructor, setter, and interface injection as ways to supply an object's dependencies from outside itself rather than constructing them internally.

2 — Inversion of Control

Explains how inverting control of object creation and lifecycle from application code to a framework or container reshapes dependency flow in a design.

3 — Service Locator vs DI

Contrasts the service locator pattern with dependency injection, weighing hidden dependency lookups against explicit, visible constructor contracts.

Low-Level Design for MAANG Interviews

A book-shaped table of contents for LLD interview prep: OOP fundamentals through SOLID, design principles, UML, design patterns, dependency management, reliability, concurrency, domain modeling, API design, testing, refactoring, classic interview problems, advanced architecture, and performance — cross-linking Object-Oriented Programming and Patterns instead of duplicating them.