System design, drilled to senior depth.
21 topic chapters with mental models, decision tables, quantitative reasoning, and failure analysis — plus 252 calibrated questions with hidden answer signals, cross-topic design drills, and mock interview packets. Read, answer aloud, reveal the signals, tick it off.
Independently written interview practice material organized around the NeetCode System Design for Beginners topic list. Each chapter links to primary specifications and official documentation.