REST API quiz

Test your REST API knowledge with a free interactive quiz — 50 questions with answers and explanations. No signup needed to play.

What is `503 Service Unavailable` typically used for?

1. What is `503 Service Unavailable` typically used for?
2. What is the `Content-Type` request header for?
3. What is the canonical purpose of `POST`?
4. What does `500 Internal Server Error` mean?
5. Which response body format is most common for modern REST APIs?
6. What does the `DELETE` method do?
7. What does `429 Too Many Requests` mean?
8. A user is not logged in and tries to fetch their profile. What status code is most appropriate?
9. What does it mean that REST is "stateless"?
10. What is the canonical purpose of `PATCH`?
11. A user is logged in but tries to access an admin-only endpoint. What status code fits best?
12. What is the purpose of the HTTP `OPTIONS` method?

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