--- Hacking The System Design Interview Stanley Chiang Pdf -

This is the "boxes and arrows" phase. You'll map out the data flow from the client to the API Gateway, through the microservices, and into the data layer. 4. Detailed Component Design

Explores the "building blocks" of modern architecture, including Load Balancers, API Gateways, Distributed Caching, and CDN. --- Hacking The System Design Interview Stanley Chiang Pdf

You probably don't need the full PDF. You need the checklist at the back of the book. The "hack" for you is simply discipline—remembering to ask about disaster recovery and monitoring, which we often forget when nervous. This is the "boxes and arrows" phase