System Design Problems

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Design a distributed lock service like Apache ZooKeeper or etcd for coordinating distributed systems.

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Design a real-time leaderboard system for a multiplayer online game with millions of concurrent players. The system should handle score updates, rankings, and friend comparisons.

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Design a high-frequency stock trading platform handling order matching, real-time price updates, and trade execution with microsecond latency.

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Design a distributed task scheduler like Apache Airflow or Temporal that can handle millions of scheduled jobs with dependencies.

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Design a ride-sharing application matching drivers with passengers, handling real-time location tracking, fare calculation, and payments.

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Design a system like bit.ly that converts long URLs into short, memorable links. The system should handle billions of URLs with high availability and low latency.

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Design a strategy to migrate a monolithic system serving 10M users to microservices with zero downtime.

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Explain the CAP theorem and its implications for distributed system design.