Not only API fundamental questions, the interviewer also determine your knowledge and experience by asking about the API errors in a Web API testing interview. So the most common ones are :
* Missing module errors
* Documentation errors
* Parameter validation errors
* And some standard error expectations as if the result is not so predicted then the occurrence of errors can be seen and for the same warnings are specified in the form of a message. There can be one or more warnings within an individual module.
