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10 interview questions available

Design in-memory DB with TTL and backup

Design an in-memory KV DB with TTL, scans, backup

Design banking payment scheduling system

Design payment scheduler with cancel and top-K outgoing

Design flight-price search service

Implement cheapest itinerary with date filters

Write PostgreSQL updates with date filters

Trace and reduce redundant curl requests

Describe pair-programming challenge under time pressure

Implement a simplified multi-level banking system