What should be included in API test cases for thorough verification?

• A. Input parameters only
• B. Basic functionality and scope
• C. User feedback
• D. Graphical interface design

Answer: (B)

When developing API test cases for thorough verification, including basic functionality and scope is crucial. This approach ensures that the API performs its intended tasks correctly and meets the defined requirements. It involves checking that the various components of the API — such as endpoints, methods (GET, POST, PUT, DELETE), and response codes — are functioning as expected.

Focusing on basic functionality allows testers to verify that the API responds correctly to various requests, returns appropriate status codes, and handles errors as specified. Covering the scope of the API involves understanding the limits of its capabilities, ensuring that all features are tested thoroughly. Test cases based on fundamentals provide a comprehensive foundation, guiding the development of more advanced tests later.

Other options do not inherently provide a comprehensive framework for testing APIs effectively. Input parameters are important, but without understanding the broader functionality and requirements, they alone will not ensure thorough testing. User feedback can offer insights but is not a substitute for actual test cases that validate the API's operations and its specifications. Graphical interface design is irrelevant in the context of API testing, as APIs do not typically have a user interface to interact with; instead, they communicate via requests and responses over a network.