What is api tetsing How to validate response What is difference between put patch post How to do data driven in postman How can we use response data from one request to another request Rest api architecture Difference between rest api and Soap ui What is API chaining Different status codes and http methods

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API testing involves testing the functionality, reliability, performance, and security of APIs.

To validate response, check the status code, response headers, and response body
PUT is used to update an existing resource, POST is used to create a new resource, and PATCH is used to update a part of an existing resource
Data-driven testing in Postman can be done using CSV or JSON files
Response data from one request can be used in another request using environment variables
REST API architecture follows a client-server model with stateless communication
SOAP UI is a tool used for testing SOAP APIs, while REST APIs use HTTP protocol
API chaining involves making multiple API requests in a sequence
HTTP methods include GET, POST, PUT, DELETE, PATCH, and OPTIONS
Status codes include 200 OK, 201 Created, 400 Bad Request, 401 Unauthorized, 404 Not Found, and 500 Internal Server Error

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