ViewData, ViewBag, TempData: differences and uses Type Lifetime Dynami c?

Short answer: Purpose ViewDa ta Current request No Pass data to views ViewBa Current request Yes ViewData wrapper (dynamic) TempD ata Across requests No Preserved for 1 redirect only

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.