System Design Patterns: From Fundamentals to Real Systems

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Pattern Review

1. How to Use This Lesson

This lesson is the course compressed for review: every pattern in one line, every big decision in one sentence, and a diagnostic table that maps symptoms back to patterns. It does not replace the lessons. Each one-liner links back to its lesson, where the full walkthrough, the numbers, and the TL;DR card live.

Three ways to use it:

  1. The night before an interview: read sections 2 through 5 top to bottom (about 15 minutes), then run one capstone actively.
  2. During design work: use section 2 as a lookup: find your symptom, follow the link. 3

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