How do you ensure that an API you design is scalable, secure, and easy to use? What design principles do you follow?

## What to Cover 1. Key principles: RESTful design, statelessness, error handling. 2. Scalability approaches: caching, database indexing. 3. Security measures: OAuth, input validation. 4. User-centric design considerations, such as documentation and ease of access. ## Strong Answer Framework - Discuss principles and provide examples. ## Watch Out For - Avoid overly technical descriptions without context that diminish clarity.