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API Testing Interview Questions and Answers

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Ques 1. What is API testing?

API testing involves testing the application programming interfaces (APIs) to ensure they meet functional and performance requirements.

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Ques 2. Explain the difference between SOAP and RESTful APIs.

SOAP (Simple Object Access Protocol) is a protocol for exchanging structured information, while REST (Representational State Transfer) is an architectural style based on a set of constraints. RESTful APIs are generally simpler and use standard HTTP methods.

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Ques 3. What are the common HTTP methods used in API testing?

Common HTTP methods include GET (retrieve data), POST (create data), PUT (update data), DELETE (remove data), and PATCH (partially update data).

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Ques 4. What is the purpose of status codes in HTTP responses?

HTTP status codes indicate the outcome of an HTTP request. For example, 200 OK indicates success, 404 Not Found indicates a resource was not found, etc.

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Ques 5. Explain the concept of endpoint in API testing.

An endpoint is a specific URL where an API can be accessed. It represents the location where the resource can be found or manipulated.

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What are the common HTTP methods used in API testing?

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