API Testing Interview Questions and Answers is a comprehensive guide designed to help QA professionals prepare for technical interviews focused on API testing. Whether you’re a fresher exploring the basics or an experienced tester aiming to enhance your skills, this guide covers the most frequently asked interview questions along with expert-curated answers. It includes core concepts such as REST vs. SOAP, HTTP methods, status codes, authentication mechanisms (OAuth, API keys, JWT), and real-world scenarios like data validation, error handling, and performance testing. You’ll also get insights into popular tools like Postman, SoapUI, and Rest Assured, as well as automation tips and scripting examples. Each question is explained clearly to help you understand both the theory and practical implementation. Perfect for those preparing for QA, SDET, or backend testing roles, this blog ensures you're ready to handle any API-related challenge in your interview.

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