Basic API Postman Interview Questions

  1. What is Postman, and why is it used for API testing?
  2. How do you send a GET request in Postman?
  3. What is the difference between GET, POST, PUT, and DELETE methods?
  4. How do you add request headers in Postman?
  5. How can you send query parameters in Postman?
  6. What is a collection in Postman?
  7. How do you create a new request in Postman?
  8. What is the purpose of Postman variables?
  9. What are environment variables in Postman?
  10. How do you use global variables in Postman?
  11. What is a pre-request script in Postman?
  12. What is a test script in Postman?
  13. How do you check the response status code in Postman?
  14. How do you validate the response body in Postman?
  15. How do you use JSON schema validation in Postman?
  16. What is the purpose of the Tests tab in Postman?
  17. How do you extract values from a response in Postman?
  18. What are Postman workspaces?
  19. What is the difference between a public and private workspace in Postman?
  20. How do you send authentication details in Postman?
  21. What is Basic Authentication in Postman?
  22. How do you use OAuth 2.0 in Postman?
  23. How can you set up API key authentication in Postman?
  24. How do you handle cookies in Postman?
  25. What is the purpose of the Postman Console?
  26. How do you log messages in Postman Console?
  27. What is the use of the “Runner” in Postman?
  28. How do you run a collection in Postman?
  29. What is the role of Newman in Postman?
  30. How do you install Newman?
  31. How can you run a Postman collection using Newman?
  32. What file formats does Postman support for exporting collections?
  33. How do you import a collection into Postman?
  34. What is the difference between a request and a collection?
  35. How do you set dynamic variables in Postman?
  36. What are collection-level variables in Postman?
  37. How do you chain requests in Postman?
  38. What are global assertions in Postman?
  39. How do you check response time in Postman?
  40. How do you validate response headers in Postman?
  41. What is the purpose of the Body tab in Postman?
  42. What data formats does Postman support for API responses?
  43. How do you send a raw JSON body in a POST request?
  44. How do you handle form-data in Postman?
  45. What is the difference between x-www-form-urlencoded and form-data?
  46. How do you debug API tests in Postman?
  47. How do you create test scripts using JavaScript in Postman?
  48. How do you generate a random string in Postman?
  49. How do you generate a random number in Postman?
  50. How do you extract data from a response and use it in another request?
  51. What is the significance of the Tests tab in Postman?
  52. How do you check if a JSON key exists in a response?
  53. How do you verify response headers in Postman?
  54. How do you create a mock server in Postman?
  55. What is the purpose of a mock server in Postman?
  56. How do you automate API testing in Postman?
  57. How do you schedule a collection run in Postman?
  58. What is the Collection Runner in Postman?
  59. How do you integrate Postman with CI/CD tools?
  60. What is Postman Monitors?
  61. How do you create a monitor in Postman?
  62. How do you share collections with a team in Postman?
  63. How do you collaborate in Postman?
  64. How do you use scripts to automate testing in Postman?
  65. What is the significance of response time in API testing?
  66. How do you check if a response contains a specific value?
  67. What is the use of pm.expect() in Postman tests?
  68. How do you compare response data with expected values?
  69. What is the difference between local and global variables in Postman?
  70. How do you capture request and response details for debugging?
  71. How do you handle dynamic data in Postman?
  72. What is the importance of data-driven testing in Postman?
  73. How do you import data files in Postman?
  74. How do you loop through multiple test cases in Postman?
  75. What types of authentication does Postman support?
  76. How do you use JavaScript in Postman automation?
  77. What are the benefits of using Postman for API automation?
  78. How do you compare two JSON responses in Postman?
  79. What are Postman’s built-in libraries for testing?
  80. How do you retry failed requests in Postman?
  81. How do you set up conditional test execution in Postman?
  82. What is the role of Postman’s “Monitor” feature?
  83. How do you test SOAP APIs in Postman?
  84. How do you verify if an API request is successful in Postman?
  85. How do you configure SSL certificates in Postman?
  86. How do you send multi-part file uploads in Postman?
  87. What is the difference between a request parameter and a path parameter?
  88. How do you set up Postman for performance testing?
  89. How do you test rate-limiting in APIs using Postman?
  90. How do you handle pagination in API requests?
  91. What is the role of Newman in continuous testing?
  92. How do you integrate Postman tests with Jenkins?
  93. How do you validate an API response against a schema in Postman?
  94. How do you handle timeouts in Postman requests?
  95. How do you store and retrieve values between requests?
  96. What are the different types of loops in Postman scripts?
  97. How do you extract a token from a response and reuse it in another request?
  98. How do you verify response structure in Postman?
  99. How do you capture API response logs in Postman?
  100. How do you troubleshoot API request failures in Postman?

Intermediate API Postman Interview Questions ​

  1. How do you write test scripts in Postman using JavaScript?

  2. What are Postman’s built-in libraries for automation?

  3. How do you set up data-driven testing in Postman?

  4. How do you use external data sources in Postman tests?

  5. How can you loop through multiple test cases in Postman?

  6. How do you chain requests dynamically in Postman?

  7. How do you extract values from response headers in Postman?

  8. How do you validate API response headers using Postman tests?

  9. What is the difference between pm.test and pm.expect in Postman?

  10. How do you handle dynamic values in API responses?

  11. How do you validate complex JSON structures in Postman?

  12. How do you generate random data in Postman for automation testing?

  13. How do you store values in the environment and reuse them in requests?

  14. How do you implement conditional testing in Postman?

  15. How do you handle API rate limits in Postman automation?

  16. How do you use Postman monitors for scheduled API testing?

  17. How do you automate authentication token retrieval in Postman?

  18. How do you handle expired authentication tokens in Postman automation?

  19. How do you use the pm.response.to.have.status assertion in Postman tests?

  20. What is the purpose of the pm.globals.set function in Postman?

  21. How do you validate response time for performance testing in Postman?

  22. How do you integrate Postman collections with Jenkins for CI/CD automation?

  23. How do you handle API pagination in Postman automation?

  24. How do you test file uploads using Postman automation scripts?

  25. What are the advantages of using Postman scripts for API automation?

  26. How do you debug failed test cases in Postman?

  27. How do you retry failed API requests in Postman?

  28. How do you validate SOAP API responses in Postman?

  29. How do you automate OAuth2 authentication flows in Postman?

  30. How do you use Postman to test API security vulnerabilities?

  31. How do you log custom messages in Postman Console?

  32. How do you use pre-request scripts to modify request payload dynamically?

  33. How do you capture API request and response logs in Postman?

  34. How do you execute a test only if a condition is met in Postman?

  35. How do you simulate API response delays in Postman?

  36. How do you check if an API key is valid using Postman tests?

  37. How do you use setTimeout in Postman test scripts?

  38. How do you test concurrency in APIs using Postman?

  39. How do you automate multi-step workflows using Postman?

  40. How do you handle errors in Postman scripts?

  41. What is the difference between environment variables and collection variables in Postman?

  42. How do you export and import Postman environments?

  43. How do you integrate Postman tests with GitHub Actions?

  44. How do you automate header validation in API testing using Postman?

  45. How do you test JWT authentication APIs using Postman?

  46. How do you validate XML responses using Postman?

  47. How do you create and use mock servers in Postman?

  48. How do you implement looping in Postman test scripts?

  49. How do you measure response time in Postman tests?

  50. How do you verify the presence of a specific JSON key in an API response?

  51. How do you test GraphQL APIs in Postman?

  52. How do you automate status code validation in Postman?

  53. How do you set up global test configurations in Postman?

  54. How do you log request details in Postman test scripts?

  55. How do you use Postman for WebSocket API testing?

  56. How do you generate API test reports in Postman?

  57. How do you validate API response body structure using JSON schema in Postman?

  58. How do you simulate different network conditions in Postman?

  59. How do you store and retrieve API response data for later use in Postman?

  60. How do you automate API failure handling in Postman?

  61. How do you run Postman tests on a schedule?

  62. How do you execute parameterized tests in Postman?

  63. How do you automate API contract validation in Postman?

  64. How do you handle API redirects in Postman?

  65. How do you extract multiple values from an API response in Postman?

  66. How do you test API versioning using Postman?

  67. How do you ensure backward compatibility in API automation with Postman?

  68. How do you automate SOAP API tests using Postman scripts?

  69. How do you validate API response types in Postman?

  70. How do you automate multi-factor authentication (MFA) in Postman?

  71. How do you send multiple API requests in a loop using Postman?

  72. How do you create reusable test functions in Postman?

  73. How do you handle API request failures gracefully in Postman automation?

  74. How do you integrate Postman with third-party API testing frameworks?

  75. How do you test APIs in different environments using Postman?

  76. How do you analyze API logs in Postman?

  77. How do you validate UUIDs in API responses using Postman?

  78. How do you automate timestamp validation in Postman API tests?

  79. How do you ensure API response consistency across different test runs?

  80. How do you automate complex API workflows in Postman?

  81. How do you generate API documentation automatically using Postman?

  82. How do you perform API monitoring in Postman?

  83. How do you capture and analyze API performance metrics in Postman?

  84. How do you automate token expiration and refresh scenarios in Postman?

  85. How do you handle different content types in Postman test scripts?

  86. How do you extract and manipulate nested JSON data in Postman?

  87. How do you execute database validations in Postman API tests?

  88. How do you test APIs with varying payload sizes in Postman?

  89. How do you enforce API response SLAs using Postman tests?

  90. How do you automate API cleanup tasks after test execution in Postman?

  91. How do you validate API request and response sizes in Postman?

  92. How do you perform batch API testing using Postman automation?

  93. How do you integrate Postman tests with CI/CD pipelines?

  94. How do you validate API response caching behavior in Postman?

  95. How do you automate API tests for mobile applications using Postman?

  96. How do you compare API responses across different environments in Postman?

  97. How do you handle API request dependencies in Postman automation?

  98. How do you ensure API stability in Postman automation tests?

  99. How do you validate API error handling mechanisms using Postman?

  100. How do you generate automated API test reports from Postman?

 

Advanced API Postman Interview Questions ​

  1. How do you handle OAuth 1.0 authentication in Postman?

  2. How do you automate API penetration testing using Postman?

  3. How do you integrate Postman with Docker for API testing?

  4. How do you optimize Postman tests for large-scale API testing?

  5. How do you perform API contract testing using Postman?

  6. How do you create dynamic variables using Postman scripts?

  7. How do you validate API payload encryption using Postman?

  8. How do you automate API performance benchmarking in Postman?

  9. How do you handle API versioning in Postman automation?

  10. How do you perform API testing in Kubernetes using Postman?

  11. How do you test API failover scenarios using Postman?

  12. How do you integrate Postman with security testing tools?

  13. How do you use Postman for fuzz testing APIs?

  14. How do you simulate various HTTP error scenarios in Postman?

  15. How do you implement advanced response data validation in Postman?

  16. How do you automate API logging and reporting in Postman?

  17. How do you perform deep API integration testing with Postman?

  18. How do you validate API rollback mechanisms using Postman?

  19. How do you implement advanced authentication flows in Postman?

  20. How do you test API load balancing using Postman?

  21. How do you create custom Postman libraries for API automation?

  22. How do you perform API security regression testing in Postman?

  23. How do you validate API request replay attacks using Postman?

  24. How do you configure Postman for enterprise-scale API testing?

  25. How do you create custom Postman plugins for automation?

  26. How do you test serverless APIs using Postman?

  27. How do you validate API compliance with industry standards in Postman?

  28. How do you execute parallel API tests using Postman?

  29. How do you automate multi-user API interactions using Postman?

  30. How do you generate synthetic test data dynamically in Postman?

  31. How do you automate API token-based authentication expiration scenarios?

  32. How do you use Postman for API audit logging and compliance?

  33. How do you automate API testing for financial transactions using Postman?

  34. How do you validate API behavior under network throttling using Postman?

  35. How do you implement chaos testing for APIs using Postman?

  36. How do you conduct advanced SQL injection testing using Postman?

  37. How do you validate API data consistency across multiple endpoints?

  38. How do you integrate Postman tests with cloud-based API gateways?

  39. How do you automate API schema validation using Postman?

  40. How do you simulate concurrent user sessions in Postman API tests?

  41. How do you validate API failure recovery mechanisms in Postman?

  42. How do you perform GraphQL API stress testing in Postman?

  43. How do you create self-healing API tests in Postman?

  44. How do you automate event-driven API testing with Postman?

  45. How do you integrate Postman with AI-powered testing frameworks?

  46. How do you validate API response integrity in multi-cloud environments?

  47. How do you automate blockchain API testing with Postman?

  48. How do you perform end-to-end API validation using Postman?

  49. How do you verify API response consistency across different regions?

  50. How do you automate API testing for microservices architectures?

  51. How do you handle circular dependencies in API workflows using Postman?

  52. How do you implement advanced request chaining in Postman?

  53. How do you validate serverless function triggers in API tests?

  54. How do you automate API security policy enforcement in Postman?

  55. How do you simulate API traffic spikes using Postman?

  56. How do you automate API testing for high-frequency trading systems?

  57. How do you validate API behavior under different time zones?

  58. How do you integrate Postman tests with blockchain smart contracts?

  59. How do you automate API replays for debugging production issues?

  60. How do you validate API behavior in distributed architectures using Postman?

  61. How do you automate API testing for healthcare compliance (HIPAA)?

  62. How do you automate API validation for AI-based recommendation engines?

  63. How do you execute long-running API tests using Postman?

  64. How do you test multi-tenant APIs using Postman automation?

  65. How do you validate API behavior in multi-threaded environments?

  66. How do you simulate API interactions for IoT devices using Postman?

  67. How do you integrate Postman API tests with DevSecOps pipelines?

  68. How do you validate API response caching mechanisms?

  69. How do you automate API testing for 5G and edge computing environments?

  70. How do you ensure API backward compatibility in Postman tests?

  71. How do you implement machine learning-driven test case generation in Postman?

  72. How do you perform compliance testing for financial APIs in Postman?

  73. How do you validate API behavior in hybrid cloud environments?

  74. How do you execute GraphQL mutation testing using Postman?

  75. How do you simulate API response mutations for A/B testing?

  76. How do you integrate Postman with test data management tools?

  77. How do you automate API testing for quantum computing applications?

  78. How do you validate API interaction with third-party SaaS applications?

  79. How do you automate API policy enforcement testing using Postman?

  80. How do you conduct regulatory compliance testing for APIs?

  81. How do you automate API testing for geo-redundant systems?

  82. How do you simulate API request failures at different layers?

  83. How do you automate API security posture validation in Postman?

  84. How do you validate API requests against business logic constraints?

  85. How do you test AI-based conversational APIs using Postman?

  86. How do you automate advanced load testing scenarios in Postman?

  87. How do you integrate Postman with AI-driven anomaly detection tools?

  88. How do you validate API integration with serverless machine learning models?

  89. How do you automate API penetration testing for cloud-native applications?

  90. How do you ensure API data consistency during transactional rollbacks?

  91. How do you automate compliance reporting for APIs?

  92. How do you validate API interactions with decentralized applications?

  93. How do you implement synthetic monitoring for APIs in Postman?

  94. How do you execute self-adjusting API tests using Postman?

  95. How do you integrate Postman API tests with data lakes?

  96. How do you automate API security validation for CI/CD pipelines?

  97. How do you execute zero-trust API security validation in Postman?

  98. How do you automate testing for machine learning model APIs?

  99. How do you ensure API response determinism in event-driven architectures?

  100. How do you implement API observability and monitoring using Postman?