Design a URL shortening service like bit.ly. The service should take a long URL and return a shortened version. Ensure that your design includes scaling, high availability, and mechanisms for redirection. Consider databases, data storage, and load balancing as part of the solution.

## What to Cover Explain how to manage large volumes of data, user scalability, and the architectural components needed for a URL shortener. Discuss considerations around data persistence and retrieval. ## Strong Answer Framework Identify components: service for URL management, database for storage, API endpoints for user interactions, and cacheing. ## Watch Out For Ensure your design is robust and allows for easy scaling as user base grows and consider rate limiting for misuse.