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.

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.

10 — 200+ MAANG OOP Interview Questions

Reference bank of 200+ OOP interview questions spanning conceptual, coding, and design-interview formats.

2 — UML Sequence Diagrams

Reference appendix entry for sequence diagrams — object interactions and message ordering over time.

3 — UML State Diagrams

Reference appendix entry for state diagrams — modeling object lifecycle and state transitions.

4 — UML Activity Diagrams

Reference appendix entry for activity diagrams — modeling control flow and business logic across objects.