10 critical REST API interview questions for 2025—answered

The text is a comprehensive discussion on key aspects of REST APIs, focusing on concepts essential for engineering roles that involve API integration and management. It explains the significance of idempotency, differentiating between PUT and PATCH requests, and highlights the importance of versioning for backward compatibility. The role of HTTP status codes in conveying request outcomes and caching strategies to enhance performance are also elucidated. Additionally, the text covers OAuth as a framework for secure authorization, rate limiting to preserve API stability, and the use of headers for additional request context. It contrasts REST's stateless design with stateful APIs and compares REST with SOAP, noting REST's flexibility against SOAP's formality. The content is attributed to Jon Gitlin, Senior Content Marketing Manager at Merge, who has a background in integration and automation, underscoring Merge's role as an integration platform beyond its Unified API product.

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