API Testing Bytes

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Few of my colleagues are frequently asking me about API Testing related questions that API Tester should know. Here is a byte of some questions I found on internet-
  1. What is API Testing and Why API Testing?
  2. Is there any difference between SOAP and REST API testing? If so, how?
  3. Key things you test in an API - let's say a GET API to fetch a list of 5 records with id and name
  4. GET vs POST
  5. POST vs PUT vs PATCH - example for each
  6. What do you mean when you say PUT is idempotent? Conditions for idempotency?
  7. Do you follow any strategy for sending large payloads in POST.
  8. Is it a good idea to have assertions for request headers when testing apis?
  9. How do you get a request header in Rest-Assured?
  10. If I send a text file as an input in a POST call, what will be the content-type?
  11. Key things to test when you API response feeds into a down stream system?
  12. URI vs URL - with a simple example.
  13. What is JWT and it's format. How does JWT authentication works?
  14. Do you know if caching is applied in the rest api's that you test? How do you test caching in api's
  15. How do you test expired or invalid tokens in your API's?
  16. How do you test user roles and permissions in your API, tell us some of the best practices that you follow for testing such user permissions in API's.
  17. Have you heard of the term rate-limiting? Can you explain when should we use rate limiting in API's
  18. Do you generate reports of the api tests that you run? What are some key attributes to include in the report.
  19. Have you heard of the term api gateway? What does it do?
  20. What is the difference in path param and query params?
  21. Do we need to use POJO class and serialisation in RestAssured, when we can directly send request body in the form of String?
  22. Can I use cookies with rest assured - if so how can I set a cookie for a domain?
  23. Do you know what is a HEAD request? Can you think of a scenario when HEAD request would be needed.
  24. Is POST a cacheable method? Is PUT a cacheable method?
  25. Difference between api virtualisation and mocking?
  26. What is JSON Schema? Can I use same json schema for validating the response of two different api's?
  27. What is API caching and in how many ways can we cache api response.

Source: https://www.linkedin.com/posts/rahulydv_work-experience-resume-activity-7035905957964431361-cwLH
Location: New Delhi, Delhi, India

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