Difference between conventional routing and attribute routing?

Short answer: Conventional routing: Routes defined centrally (usually in Startup), patterns applied globally. Attribute routing: Routes declared directly on controllers/actions via attributes ([Route], [HttpGet]). Attribute routing is more flexible and explicit.

Real-world example (ShopNest)

ShopNest registers AppDbContext as Scoped and IMemoryCache as Singleton. Putting DbContext in a Singleton causes threading bugs.

Say this in the interview

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