100 Rest Assured Interview Questions

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Rest Assured is a powerful Java library used widely for testing RESTful APIs, enabling seamless integration of HTTP requests and responses in automated test scripts. Its intuitive, BDD-inspired syntax allows testers and developers to validate API endpoints effortlessly with methods like given(), when(), and then(). Mastering Rest Assured provides the essential skills needed to design reliable tests, verify responses, and streamline API testing workflows.

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100 Rest Assured Interview Questions

This article presents 100 crucial interview questions covering both basics and advanced concepts of Rest Assured, making it an essential resource for anyone looking to strengthen their API testing knowledge or prepare for interviews.

Basic Rest Assured Questions

  1. What is Rest Assured?
  2. Why do we use Rest Assured for API testing?
  3. What are the advantages of using Rest Assured?
  4. How do you set up Rest Assured in a Maven project?
  5. Explain the syntax for writing a basic Rest Assured test.
  6. What is the purpose of the given(), when(), and then() methods?
  7. How can you validate the status code of a response in Rest Assured?
  8. How do you extract data from a JSON response?
  9. Explain the difference between get(), post(), put(), and delete() methods in Rest Assured.
  10. How can you add headers to a request in Rest Assured?
  11. What is the purpose of contentType() in Rest Assured?
  12. How do you handle authentication in Rest Assured?
  13. How can you validate response time in Rest Assured?
  14. Explain how to validate JSON schema in Rest Assured.
  15. What is the purpose of the queryParam() method?
  16. How do you pass path parameters in Rest Assured?
  17. How do you send form data with Rest Assured?
  18. Can you validate cookies in a response? If yes, how?
  19. How do you log requests and responses in Rest Assured?
  20. Explain how you can make requests with custom headers.
  21. What is the difference between expect() and then() in Rest Assured?
  22. How can you assert multiple response fields in a single test?
  23. How can you use Rest Assured with different HTTP status codes?
  24. How do you handle response content encoding in Rest Assured?
  25. What are the default content types supported by Rest Assured?
  26. How can you disable SSL certificate verification?
  27. How do you handle multiple query parameters in Rest Assured?
  28. How can you pass complex JSON payloads in Rest Assured?
  29. Explain how to parse XML responses in Rest Assured.
  30. What is the purpose of the Response interface?
  31. How can you handle multipart file uploads in Rest Assured?
  32. How do you extract the value of a specific JSON node?
  33. Explain how to use assertions to check JSON keys and values.
  34. What is the given().auth() method used for?
  35. How do you send a DELETE request with Rest Assured?
  36. How do you use custom matchers with Rest Assured?
  37. Can you explain what Groovy path expressions are in Rest Assured?
  38. How do you capture and use response headers in subsequent requests?
  39. How can you validate JSON array elements in Rest Assured?
  40. What are the different ways to handle dynamic parameters in URLs?

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Advanced Rest Assured Questions

  1. How can you integrate Rest Assured with Cucumber for BDD?
  2. How can you handle OAuth2 authentication in Rest Assured?
  3. Explain the ResponseSpecBuilder and RequestSpecBuilder classes.
  4. What is the purpose of RestAssured.baseURI?
  5. How can you create a custom RequestSpecification?
  6. Explain PathParams vs. QueryParams.
  7. How do you handle preemptive authentication in Rest Assured?
  8. How can you reuse common headers across multiple tests?
  9. How can you chain multiple requests in Rest Assured?
  10. How do you use Rest Assured with Spring Boot?
  11. Explain how Rest Assured supports data-driven testing.
  12. How do you assert the structure of a JSON array?
  13. How can you validate deeply nested JSON elements?
  14. How can you test REST APIs using Rest Assured and TestNG?
  15. Explain the purpose of the Matchers class in Rest Assured.
  16. How can you handle different environments in Rest Assured?
  17. How do you create reusable helper methods in Rest Assured?
  18. What are some best practices for Rest Assured tests?
  19. Explain how to use JSON schema validation.
  20. Can you handle pagination in Rest Assured?
  21. How can you validate a JSON response with dynamic fields?
  22. What is the extract() method used for?
  23. How do you handle response transformations in Rest Assured?
  24. Explain how you would test a SOAP service with Rest Assured.
  25. How do you use RelaxedHTTPSValidation in Rest Assured?
  26. How can you validate content type in Rest Assured?
  27. How do you use Rest Assured with JUnit?
  28. Explain how to integrate Rest Assured with CI/CD pipelines.
  29. How can you test APIs with bearer tokens in Rest Assured?
  30. Explain the use of SpecificationQueried in Rest Assured.
  31. How do you convert JSON responses to Java objects?
  32. How can you validate XML responses in Rest Assured?
  33. How can you configure default specifications in Rest Assured?
  34. How do you handle global timeout configurations?
  35. Explain the purpose of assertThat() in Rest Assured.
  36. How do you capture error responses for debugging?
  37. Explain the concept of header() vs. headers() in Rest Assured.
  38. How do you perform performance tests using Rest Assured?
  39. How can you handle response filtering in Rest Assured?
  40. What is ResponseOptions in Rest Assured?

Troubleshooting and Miscellaneous

  1. How can you handle SSL exceptions in Rest Assured?
  2. What is RequestSpecification in Rest Assured?
  3. How do you use Rest Assured to mock API responses?
  4. Explain the use of ContentType.ANY in Rest Assured.
  5. How do you implement error handling in Rest Assured tests?
  6. What are the common challenges with Rest Assured?
  7. How can you debug issues with REST API tests?
  8. Explain what MatcherAssert.assertThat() is used for.
  9. How can you add custom error messages in assertions?
  10. How can you run Rest Assured tests in parallel?
  11. How can you integrate Rest Assured with RESTful web services?
  12. How do you capture session tokens for further requests?
  13. How do you verify binary data with Rest Assured?
  14. How do you handle compressed responses in Rest Assured?
  15. Explain the RestAssured.proxy() method.
  16. How can you pass custom headers dynamically?
  17. How do you convert Java objects to JSON for Rest Assured requests?
  18. How do you verify JSON against a predefined structure?
  19. What are the limitations of Rest Assured?
  20. Explain the difference between header() and headerMap() in Rest Assured.

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Rest Assured simplifies API testing, offering powerful tools to validate and verify RESTful services efficiently. Mastering these 100 interview questions enhances your readiness, making you more confident in designing, executing, and troubleshooting API tests with Rest Assured in your projects or interviews.

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