Master large-scale distributed architectures. Face high-level design problems and receive constructive feedback.
System design rounds evaluate your ability to design scalable distributed architectures. You must explain load balancing, SQL vs NoSQL selections, caching policies, microservices structure, and failure recovery plans.
Practice designing platforms like YouTube, Uber, Twitter, or WhatsApp
Covers load balancers, CDN, key-value stores, distributed messaging, and databases
Focuses on tradeoffs, scalability bottlenecks, and disaster recovery strategies
Immediate objective scorecard on structural design and technical depth
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Sophia presents a high-level system design problem (e.g., "Design a rate limiter"). You explain your components, database selections, and scaling tradeoffs. Sophia asks follow-ups on single points of failure, scaling, and bottleneck resolution.
System design is typically asked for 2+ years of experience. However, basic design concepts like API design, database selection, and caching are sometimes asked even at SDE-1 level in product companies.