API Design quiz

Test your API Design knowledge with a free interactive quiz — 22 questions with answers and explanations. No signup needed to play.

What is the purpose of an API key or token?

1. What is the purpose of an API key or token?
2. In REST, what does a resource typically map to?
3. What does it mean for an API endpoint to be idempotent?
4. What data format is most commonly used in modern web APIs?
5. What does an HTTP 404 status code indicate?
6. What is an API?
7. Which status code range indicates a client error?
8. Why is API versioning useful?
9. What is a good practice for naming REST resource URLs?
10. Which HTTP method is conventionally used to retrieve data?

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