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System Design Interview Practice
Scalability, load balancing, caching, databases, messaging, and distributed systems.
Start Practice
System DesignIntermediateAdvancedExpert45 min
Choose mode, difficulty & questions on the next screen
Topics Covered
ScalabilityLoad BalancingCachingDatabase DesignMessage QueuesMicroservicesCAP TheoremRate Limiting
Difficulty Levels
Intermediate
Practical application, common patterns, and real-world problem solving.
Advanced
Deep internals, performance optimization, and architectural decisions.
Expert
Staff+ level. Edge cases, trade-off analysis, and system-level thinking.
Question Types
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Coding
Write code, implement functions, solve problems
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Conceptual
Explain concepts, compare approaches, discuss trade-offs
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System Design
Architect systems, design APIs, plan infrastructure