Ask targeted questions about user count, latency constraints, and data freshness.

Discuss reliability, security (encryption/rate-limiting), and fault tolerance.

Draw the initial block diagram showing the flow of data.

Zoom in on specific bottlenecks, like caching strategies or database sharding.

Before diving into specific problems, the guide establishes the "building blocks" of modern architecture:

The second half of the book applies these concepts to real-world questions frequently asked by FAANG companies. Each problem follows a repeatable, step-by-step solution framework:

Detailed looks at web servers, API Gateways , load balancers, and CDNs.

The book is divided into two primary sections: theoretical fundamentals and practical interview scenarios.