13 September 2025

#RestAssured

#RestAssured

Key Concepts


Topic Sub-Topics (comma separated) Basic Intermediate Advanced Expert
Introduction What is RestAssured, Features, Advantages, Setup in Maven/Gradle, Basic Syntax ✅
HTTP Methods GET, POST, PUT, DELETE, PATCH basics ✅
Request & Response RequestSpecification, Response object, ValidatableResponse, Logging ✅
Assertions Status code validation, Header validation, Body content validation, Hamcrest matchers ✅
Authentication Basic Auth, Digest Auth, Preemptive Auth, OAuth1, OAuth2, Token-based auth ✅
Parameters & Headers Path parameters, Query parameters, Form params, Custom headers ✅
JSON & XML Handling JSONPath, XPath, Schema validation, Parsing responses ✅
Request/Response Specification Reusable request specs, response specs, Filters ✅
Data-Driven Testing Parameterization, TestNG DataProvider, External file inputs (CSV/Excel/JSON) ✅
Chaining Requests Extracting tokens, Reusing values across requests, Session management ✅
Advanced Validations Nested JSON, Arrays, Complex conditions, Response time validation ✅
File Handling File upload, Multipart requests, File download testing ✅
Filters & Interceptors Logging filters, Custom filters, Mocking requests ✅
Performance & Security Testing SLA validation, Stress testing basics, Security checks ✅
Framework Integration RestAssured with TestNG, JUnit, Cucumber BDD ✅
CI/CD & Best Practices Project structuring, Reusable utilities, CI/CD pipeline integration, Reporting (Allure, Extent) ✅

Interview question

1. Basics of REST Assured

  1. What is REST Assured?
  2. What are the key features of REST Assured?
  3. How do you add REST Assured dependency in Maven/Gradle?
  4. What protocols are supported by REST Assured?
  5. How do you configure BaseURI and BasePath in REST Assured?
  6. Write a simple REST Assured GET request example.
  7. How do you log requests and responses in REST Assured?
  8. What are common annotations used with REST Assured and TestNG?
  9. How do you validate the status code in REST Assured?
  10. What is the difference between given(), when(), then()?
  11. How do you test an HTTPS API using REST Assured?
  12. What are common HTTP methods supported in REST Assured?
  13. How do you pass query parameters in REST Assured?
  14. How do you pass path parameters in REST Assured?
  15. How do you validate response headers in REST Assured?
  16. What are the different logging options available?
  17. How do you disable SSL validation in REST Assured?
  18. How do you set custom request headers?
  19. What is the role of RestAssured.defaultParser?
  20. What are common challenges in setting up REST Assured?
  21. What are the advantages of using REST Assured over Postman?
  22. Can REST Assured test SOAP services?
  23. What is a Response object in REST Assured?
  24. How do you validate cookies in REST Assured?
  25. How do you pretty print the response body?

2. HTTP Methods

  1. How do you perform a GET request in REST Assured?
  2. How do you perform a POST request with JSON body?
  3. How do you send form data in REST Assured?
  4. How do you perform a PUT request in REST Assured?
  5. How do you perform a DELETE request in REST Assured?
  6. What is the difference between PUT and PATCH?
  7. How do you handle PATCH requests in REST Assured?
  8. How do you add query parameters to a GET request?
  9. How do you pass multiple headers in REST Assured?
  10. What are path parameters and how do you use them?
  11. How do you upload a file using REST Assured?
  12. How do you download a file using REST Assured?
  13. How do you send XML body in POST requests?
  14. How do you send JSON body using POJO classes?
  15. What is multi-part request in REST Assured?
  16. How do you validate response time for an API?
  17. How do you test API response codes?
  18. How do you test different content types (JSON, XML)?
  19. How do you test redirects using REST Assured?
  20. How do you send raw string as request body?
  21. How do you test APIs that require form authentication?
  22. How do you reuse common request configurations?
  23. How do you chain multiple requests in REST Assured?
  24. What is ResponseSpecification in REST Assured?
  25. What is RequestSpecification in REST Assured?

3. JSON Handling

  1. How do you parse JSON response in REST Assured?
  2. What is JsonPath in REST Assured?
  3. How do you extract a single field from JSON response?
  4. How do you extract a list of values from JSON response?
  5. How do you validate nested JSON objects?
  6. How do you validate JSON arrays in REST Assured?
  7. How do you compare two JSON responses?
  8. What are common JsonPath functions used?
  9. How do you handle optional fields in JSON validation?
  10. How do you extract response as a String?
  11. How do you validate JSON response length?
  12. How do you deserialize JSON to a POJO in REST Assured?
  13. What is the difference between Gson and Jackson in REST Assured?
  14. How do you validate partial JSON response?
  15. How do you validate numeric values in JSON?
  16. How do you handle dynamic keys in JSON response?
  17. How do you validate JSON schema in REST Assured?
  18. How do you pretty print JSON response?
  19. How do you assert null values in JSON response?
  20. How do you handle JSON arrays with mixed objects?
  21. How do you use JsonPath with filters?
  22. What are common errors in JSON parsing?
  23. How do you map nested JSON into POJOs?
  24. How do you handle missing fields in JSON response?
  25. How do you ignore extra fields while parsing JSON?

4. XML Handling

  1. How do you send XML as request body in REST Assured?
  2. How do you parse XML response in REST Assured?
  3. What is XmlPath in REST Assured?
  4. How do you extract elements from XML response?
  5. How do you validate XML attributes?
  6. How do you validate nested XML elements?
  7. What is the difference between JsonPath and XmlPath?
  8. How do you validate XML schema in REST Assured?
  9. How do you pretty print XML response?
  10. How do you handle namespaces in XML response?
  11. How do you compare two XML responses?
  12. How do you handle XML arrays?
  13. What is XPath and how is it used in REST Assured?
  14. How do you extract text values from XML elements?
  15. How do you validate optional XML elements?
  16. How do you handle large XML responses?
  17. How do you validate order of XML nodes?
  18. How do you ignore white spaces in XML validation?
  19. How do you validate numeric values in XML?
  20. How do you handle special characters in XML?
  21. What are common XML parsing exceptions?
  22. How do you convert XML response to POJO?
  23. How do you test SOAP APIs with REST Assured?
  24. How do you validate mixed content XML nodes?
  25. How do you handle CDATA in XML?

5. Authentication & Authorization

  1. How do you pass basic authentication in REST Assured?
  2. How do you pass preemptive basic authentication?
  3. How do you handle digest authentication?
  4. How do you handle form authentication in REST Assured?
  5. How do you pass OAuth2 tokens in REST Assured?
  6. How do you get OAuth2 token programmatically?
  7. How do you refresh an OAuth2 token?
  8. What is the difference between OAuth1 and OAuth2?
  9. How do you send Bearer tokens in REST Assured?
  10. How do you handle API keys in REST Assured?
  11. How do you handle certificate-based authentication?
  12. How do you bypass SSL validation?
  13. How do you validate secured endpoints?
  14. How do you test expired tokens in REST Assured?
  15. How do you test invalid credentials?
  16. How do you test access denied scenarios?
  17. How do you test token revocation?
  18. How do you automate token fetching for APIs?
  19. How do you pass custom authentication headers?
  20. How do you simulate session-based authentication?
  21. How do you test JWT-based APIs?
  22. How do you validate token expiry in API tests?
  23. How do you implement re-authentication in REST Assured tests?
  24. What are best practices for storing credentials in automation?
  25. How do you test multi-factor authentication APIs?

6. Assertions & Validations

  1. What are assertions in REST Assured?
  2. How do you validate HTTP status codes?
  3. How do you validate response headers?
  4. How do you validate response body?
  5. How do you use Hamcrest matchers in REST Assured?
  6. How do you check if response contains a string?
  7. How do you validate numeric values in response?
  8. How do you validate collection size in response?
  9. How do you check if a value exists in JSON array?
  10. How do you validate boolean fields in response?
  11. How do you perform soft assertions in REST Assured?
  12. How do you validate schema of response?
  13. How do you check if header exists in response?
  14. How do you validate multiple values in response body?
  15. How do you validate response time?
  16. How do you chain multiple assertions together?
  17. How do you perform conditional assertions?
  18. What are custom assertions in REST Assured?
  19. How do you assert null values in response?
  20. How do you validate against regex patterns?
  21. How do you validate dynamic fields in response?
  22. How do you assert order of elements in response?
  23. How do you use extract().path() for validation?
  24. How do you assert exact matches in response?
  25. How do you perform negative assertions?

7. Serialization & Deserialization

  1. What is serialization in REST Assured?
  2. What is deserialization in REST Assured?
  3. How do you serialize a POJO to JSON?
  4. How do you deserialize JSON to POJO?
  5. How do you use Gson in REST Assured?
  6. How do you use Jackson in REST Assured?
  7. What is the difference between Gson and Jackson?
  8. How do you handle nested objects in serialization?
  9. How do you handle lists in serialization?
  10. How do you handle maps in serialization?
  11. How do you use @JsonProperty in serialization?
  12. How do you ignore unknown fields in deserialization?
  13. How do you handle optional fields in POJO?
  14. How do you validate POJO mapping with JSON response?
  15. How do you serialize POJO to XML?
  16. How do you deserialize XML to POJO?
  17. How do you handle custom serializers?
  18. How do you handle custom deserializers?
  19. How do you validate object mapping in tests?
  20. How do you handle date/time serialization?
  21. How do you handle enums in serialization?
  22. How do you handle polymorphic types in serialization?
  23. What are common errors in serialization/deserialization?
  24. How do you debug serialization issues?
  25. How do you validate JSON schema against POJO?

8. Framework Integration

  1. How do you integrate REST Assured with TestNG?
  2. How do you integrate REST Assured with JUnit?
  3. How do you integrate REST Assured with Cucumber BDD?
  4. How do you implement Data Driven Testing with REST Assured?
  5. How do you use Excel as data source in REST Assured?
  6. How do you generate reports in REST Assured framework?
  7. What is Extent Reports and how do you use it?
  8. How do you use Allure Reports with REST Assured?
  9. How do you use log4j with REST Assured?
  10. How do you integrate REST Assured with Maven?
  11. How do you integrate REST Assured with Gradle?
  12. How do you integrate REST Assured with Jenkins?
  13. How do you run REST Assured tests in CI/CD pipeline?
  14. How do you run parallel tests with REST Assured?
  15. How do you implement tagging in REST Assured tests?
  16. How do you manage configuration in framework?
  17. How do you externalize test data in REST Assured framework?
  18. How do you reuse request specifications across tests?
  19. How do you create a base test class?
  20. How do you implement retry logic in framework?
  21. How do you handle environment-specific configurations?
  22. How do you implement parameterization in Cucumber with REST Assured?
  23. How do you integrate REST Assured with Docker?
  24. How do you run REST Assured tests in cloud CI tools?
  25. How do you organize large-scale REST Assured frameworks?

9. Advanced Features

  1. What are Filters in REST Assured?
  2. How do you implement a logging filter?
  3. How do you create custom filters?
  4. What is the use of ResponseFilter?
  5. What is the use of RequestFilter?
  6. How do you chain multiple filters?
  7. How do you capture request and response logs?
  8. How do you implement request/response modification with filters?
  9. How do you debug API traffic using filters?
  10. How do you use RequestSpecification with filters?
  11. How do you measure response time with filters?
  12. How do you integrate filters with reporting?
  13. What are common use cases of filters?
  14. How do you capture authentication tokens with filters?
  15. How do you modify headers using filters?
  16. How do you capture request body using filters?
  17. How do you capture response body using filters?
  18. How do you implement reusable filter libraries?
  19. How do you handle performance monitoring with filters?
  20. How do you extend REST Assured using filters?
  21. What are common pitfalls in using filters?
  22. How do you secure sensitive logs in filters?
  23. How do you debug failed requests with filters?
  24. How do you track API metrics with filters?
  25. How do you integrate filters in custom frameworks?

10. Best Practices & API Testing Strategy

  1. What are best practices for API testing with REST Assured?
  2. How do you design maintainable REST Assured tests?
  3. How do you structure a REST Assured project?
  4. How do you manage configuration in large test suites?
  5. How do you externalize test data in API testing?
  6. How do you handle test environment differences?
  7. How do you manage authentication tokens in frameworks?
  8. How do you secure sensitive data in test scripts?
  9. How do you ensure idempotency in API tests?
  10. How do you test negative scenarios in REST Assured?
  11. How do you implement data-driven testing strategy?
  12. How do you test APIs with dependencies?
  13. How do you manage test data setup/teardown?
  14. How do you ensure scalability of REST Assured tests?
  15. How do you balance API and UI testing in projects?
  16. What are common challenges in REST Assured automation?
  17. How do you measure API coverage in testing?
  18. How do you handle flaky API tests?
  19. How do you integrate contract testing with REST Assured?
  20. How do you implement CI/CD for API automation?
  21. How do you monitor API performance using tests?
  22. What are security considerations in API testing?
  23. How do you test rate limiting in APIs?
  24. How do you test resilience and retries in APIs?
  25. What is the future of API test automation with REST Assured?

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