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Deprecation strategies?

Q: Deprecation strategies?

Short answer: Mark old versions as deprecated via documentation and HTTP response headers. Return warning headers or custom fields indicating version deprecation. Gradually phase out old versions, allowing clients to migrate. Consider introducing sunset policies and endpoints to notify clients. Real-world example (ShopNest) A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors. Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: Mark old versions as deprecated via documentation and HTTP response headers. Return warning headers or custom fields indicating version deprecation. Gradually phase out old versions, allowing clients to migrate. Consider introducing sunset policies and endpoints to notify clients.

Real-world example (ShopNest)

A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors.

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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