Adding more machines (Horizontal) vs. adding more power to one machine (Vertical). Shows you understand cost, complexity, and hardware limits.
Many engineers look for a single book or PDF to memorize blueprints for complex systems like Twitter, Netflix, or Uber. However, system design interviews are not a test of memorization. Why Memorizing PDFs Fails
The definitive book for understanding the underlying theory of distributed databases and storage engines. Adding more machines (Horizontal) vs
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Estimate Daily Active Users (DAU), read/write ratios, storage requirements, and network bandwidth. Many engineers look for a single book or
Never start drawing architecture immediately. Spend the first 5 to 10 minutes defining the boundaries of the problem.
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Mention central logging, metrics collection, and distributed tracing to monitor system health. Must-Know Architectural Concepts
: Detailed explanations of core concepts like microservices vs. monoliths, the CAP theorem, data modeling, and networking protocols.