Top 20 most asked API Questions in Interviews.

Reference : API

1. What is an API?

2. What are the different types of APIs?

3. What is REST in API?

4. What is the difference between GET, POST, PUT, and DELETE HTTP methods?

5. What is JSON?

6. What is the difference between SOAP and REST APIs?

7. What is an API endpoint?

8. What are the common HTTP status codes used in APIs?

9. What is authentication in API?

10. What is API rate limiting?

11. What is an API key?

12. What is the difference between synchronous and asynchronous
    API calls?

13. What is CORS in API?

14. What is versioning in an API?

15. What is an API client?

16. What is a Webhook in API?

17. What is a JSON Web Token (JWT)?

18. What is the purpose of an API gateway?

19. What is an API documentation?

20. What is a RESTful API?

21. What is API authentication, and can you name a few common
    authentication methods?

22. What is the difference between PUT and PATCH method?

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