ASP.NET Core Web API Interview Question #88

What is API deprecation?

Routing, Versioning, OpenAPI/Swagger & API Documentation Mid-Level Intermediate

Quick Interview Answer

Deprecation communicates that an API version or feature remains available temporarily but should no longer be used for new integrations and is planned for retirement.

Detailed Explanation

Deprecation communicates that an API version or feature remains available temporarily but should no longer be used for new integrations and is planned for retirement.

A responsible deprecation process gives clients clear documentation, migration guidance, and a realistic timeline. Removing a public contract without notice can break independently deployed consumers.

Code Example

// Documentation example:
// v1 is deprecated.
// Migrate to v2 before the published retirement date.

// Keep migration instructions with the API documentation.