71. Q: How to test caching behavior in APIs?
A: Use cache headers and ensure repeated requests fetch from cache or correctly refresh when modified.
72. Q: How to test API versioning?
A: Use versioned URLs (e.g., /v1/users) or headers and verify that each version behaves independently.
73. Q: How to test version negotiation?
A: If the API supports versioning through headers, test that the correct version is returned based on the Accept-Version header.
74. Q: How to test content negotiation again?
A: Reconfirm that different Accept headers like application/xml, application/json give appropriate formatted responses.
75. Q: How to test partial updates (PATCH)?
A: Send a PATCH request with only some fields and verify that only those fields are updated, others remain unchanged.
76. Q: How to verify API handles error conditions?
A: Simulate different invalid inputs and ensure the API returns meaningful error messages and correct status codes (400, 404, etc.).
77. Q: How to verify API supports multiple HTTP methods?
A: Test each method (GET, POST, PUT, DELETE, PATCH, OPTIONS, HEAD) and ensure it performs the correct operation.
78. Q: How to test support for various data types?
A: Send and validate data types like strings, numbers, dates, binary, etc., and ensure accurate serialization/deserialization.
79. Q: What authentication methods can APIs use?
A: Test different types like Basic Auth, Bearer Tokens, and OAuth flows for access control and session management.
80. Q: What is role-based authorization and how is it tested?
A: Use users with different roles (e.g., admin/user) and verify access permissions are enforced based on roles.
81. Q: How to test for unsupported HTTP methods?
A: Try sending an unsupported method (e.g., DELETE on a read-only endpoint) and expect 405 Method Not Allowed.
82. Q: What to expect for invalid requests?
A: Send malformed JSON or invalid inputs and verify response status 400 Bad Request.
83. Q: How to test unauthorized request scenarios?
A: Send requests without authentication and expect 401 Unauthorized.
84. Q: What happens with forbidden requests?
A: When authenticated but lacking permissions, verify 403 Forbidden is returned.
85. Q: What to check for non-existent resources?
A: Use invalid resource IDs and confirm the API returns 404 Not Found.
86. Q: How to test pagination?
A: Use parameters like page and limit and verify correct resources are returned for each page.
87. Q: How to test sorting and filtering?
A: Use parameters like sort=name or filter=status=active and verify results are sorted or filtered correctly.
88. Q: How to test search functionality?
A: Provide keywords or fields in the query and ensure relevant results are returned.
89. Q: How to test batch processing in APIs?
A: Send multiple resources in a single request and verify each is processed and returned correctly.
90. Q: What is webhook testing in APIs?
A: Set up a listener URL and verify that the API pushes events to it when certain actions occur.
