System Design

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Practice bank24

T1Foundations5

T2Common5

T3Advanced7

Design a ride-hailing system (Uber)55 min
Design video streaming (YouTube / Netflix)55 min
Design search autocomplete / typeahead45 min
Design a distributed cache50 min
Design a payment system55 min
Design Google Drive / Dropbox50 min
Design a ticket-booking system (Ticketmaster)50 min

T4Expert7

Design a multi-region active-active system60 min
Design a distributed job scheduler55 min
Design a real-time analytics pipeline60 min
Design an ad-serving / bidding platform60 min
Design a globally distributed database60 min
Design a platform-scale distributed rate limiter55 min
Critique: find the failure modes in a given design45 min

C3BOTH18 min · Common Patterns

Idempotency & exactly-once semantics

idempotency, exactly-once, dedup

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