Functional and non-functional expectations that drive the system.

External and internal interfaces, contracts, and request flows.

High-level architecture, major services, and traffic flow.

A diagram or visual walkthrough of the architecture.

Data model, component internals, and low-level implementation details.

Bottlenecks, failure modes, and scale constraints.

The compromises made around consistency, latency, and cost.

How the system behaves under pressure, network partitions, and node failures.

Design Pattern: Factory deep dive for HLD & LLD interview preparation.

HLD & LLD Mastery Course

Design Pattern: Factory

Design Pattern: Singleton deep dive for HLD & LLD interview preparation.

Design Pattern: Strategy deep dive for HLD & LLD interview preparation.

<p>State Pattern, Optimization algorithms...</p>


Case Study: Design an Elevator System deep dive for HLD & LLD interview preparation.

SOLID Principles in Java deep dive for HLD & LLD interview preparation.

Introduction to High-Level Design deep dive for HLD & LLD interview preparation.

Case Study: Design a URL Shortener deep dive for HLD & LLD interview preparation.

Case Study: Design a Parking Lot deep dive for HLD & LLD interview preparation.

How HLD translates to LLD deep dive for HLD & LLD interview preparation.

Introduction to Low-Level Design deep dive for HLD & LLD interview preparation.

Scalability: Vertical vs Horizontal deep dive for HLD & LLD interview preparation.

Case Study: Design WhatsApp deep dive for HLD & LLD interview preparation.

Case Study: Design Tic Tac Toe deep dive for HLD & LLD interview preparation.

Case Study: Design YouTube deep dive for HLD & LLD interview preparation.

Case Study: Design Ride Sharing (Uber) deep dive for HLD & LLD interview preparation.

Case Study: Design a Payment System deep dive for HLD & LLD interview preparation.