As a Performance Test Engineer, you will be dealing with lots of requests and their response codes during your performance tests. These HTTP response status codes could be really useful since they give you an insight about the status of your test runs. Simply, they give you an idea about whether a specific HTTP request has been successfully completed. Even though there are lots of them, we can group them into five classes: Informational responses (100–199) Successful responses (200–299) Redirection messages (300–399) Client error responses (400–499) Server error responses (500–599) 1. Informational Responses [...]