HTTP Status Codes Every Tester Must Know

Overview

This PDF focuses on transforming HTTP status codes into actionable test decisions, moving beyond simple memorization. It guides testers on when each response is correct and what validation steps are necessary beyond the status code itself. The content prepares individuals to expose broken behavior in API testing scenarios. It addresses common challenges such as validating 2xx responses and understanding similar 4xx and 5xx responses. The guide helps testers practice realistic failure and recovery scenarios, providing focused QA resources and practical prompts for stronger API interview answers.

Table of contents

1. Turn codes into test decisions
2. Memorizing status codes won't prove API testing skill.
3. Still treating every 2xx as a pass?
4. Confused by similar 4xx and 5xx responses?
5. Need stronger API interview answers?
6. Don't just recognize the code.
7. Explain what the API really did.
8. Master Response Validation
9. Test Negative Paths
10. Practice Faster with AI
11. Prepare for the Next Role

Who this resource is for

• API Tester