#System Design

Design a file upload service similar to Dropbox. Your design should include distributed object storage for files, pre-signed URLs for direct client uploads, and a database structure for files, metadata, and share lists. **Considerations**: Choose NoSQL for metadata and share lists to enhance scalability.

Design a simplified version of Cricbuzz that supports live cricket scores, match details, player statistics, and commentary updates. Discuss the class design, entity relationships, data flow, APIs, and storage design.

How do you handle asynchronous processing for payment and booking events, including handling failures and retries gracefully?

Explain why Load Balancers are needed, how horizontal scaling is achieved, and how overall system scalability and availability are ensured.

How do you maintain database consistency, prevent double booking of seats, and manage seat inventory during high-concurrency booking scenarios?