Meta Description: Master your System Design interview with this comprehensive guide of 40 essential questions and detailed answers. From Load Balancers to Distributed Transactions, we cover the scalability concepts you need to crack interviews at Google, Amazon, Meta, and more. Introduction System design interviews are the gatekeepers to senior engineering roles at FAANG and other top-tier tech companies. They don't just test your coding skills; they test your ability to build scalable, reliable, and maintainable systems under constraint. In this guide, we break down 40 critical system design questions . We start with the core concepts and move into advanced architectural challenges, complete with real-world examples like designing Uber, Netflix, and TinyURL. Part 1: Core Concepts & Fundamentals Before diving into complex architectures, you must master the building blocks. 1. API Gateway vs. Load Balancer: What’s the difference? Answer: While both manage traffic, they serve d...