#System Design

Design a comprehensive database schema for a carpooling service. Include the specifications for the database entities and their interconnections.

How would you design a database schema for a ride-sharing application similar to Uber? Describe the entities involved and their relationships.

Design a Load Balancer, covering aspects such as architecture, algorithm, load balancing methods, and database considerations. Discuss the problem thoroughly and define both functional and non-functional requirements while also addressing scalability, performance optimization, monitoring, logging, and deployment aspects.

Design a URL Shortener system. Explain the components involved, database design choices, and how you'd handle redirecting users from a short URL to the original long URL.