.NET Core Interview Cheat Sheet

1. What is inheritance?

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2. What is ASP.NET Core and why was it created?

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3. Explain the ASP.NET Core hosting model (Host Builder + Kestrel + Startup flow).

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4. What is Kestrel and why does ASP.NET Core use it?

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5. Explain Middleware and the purpose of the ASP.NET Core Request Pipeline.

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6. Why does the order of middleware matter so much?

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7. What is Dependency Injection in ASP.NET Core and why is it built-in?

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8. Explain the three DI lifetimes (Transient, Scoped, Singleton).

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9. What is Configuration in ASP.NET Core and how does it work?

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10. What is the purpose of IOptions, IOptionsSnapshot, and IOptionsMonitor?

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11. What is Routing in ASP.NET Core?

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12. Compare Conventional Routing vs Attribute Routing.

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13. What is Model Binding?

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14. What is Model Validation and how does it work?

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15. What are Filters and why are they important?

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16. What are Razor Views?

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17. Explain Layouts, Partial Views, and View Components.

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18. What are Tag Helpers?

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19. What is TempData and how is it different from ViewData/ViewBag?

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20. What is Anti-Forgery and why is it required?

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21. How does ASP.NET Core handle static files and why is the middleware special?

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22. What is the difference between the Generic Host and Web Host in ASP.NET Core?

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23. Explain the Application Lifetime events in ASP.NET Core (IHostApplicationLifetime).

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24. What is the purpose of the Web Root and why is it separated from the Content Root?

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25. Explain the difference between Use, Run, and Map in middleware configuration.

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26. What is Environment-based configuration and why is it essential?

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27. What are Secrets in ASP.NET Core, and how are they different from configuration files?

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28. Explain the Options Pattern and why it’s preferred over directly reading from configuration.

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29. What is Razor View Compilation and why does it matter?

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30. What is the View Engine and how does Razor differ from classic engines?

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31. What are Tag Helper Scopes and how do they improve structure?

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32. What is ViewData, ViewBag, and TempData?

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33. Explain Endpoint Routing in detail.

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34. What is Model Binding Value Providers?

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35. Explain Custom Model Binding and when it is required.

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36. What is ModelState and why is it crucial?

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37. What are Filters and what are their use cases?

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38. What is an Exception Filter vs Middleware Exception Handling?

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39. Explain ViewComponents and how they differ from Partial Views.

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40. What is the Anti-Forgery System in ASP.NET Core?

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41. Explain how Static Files Middleware works and why it must be placed early.

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42. What is the Application Model in MVC and why do enterprise apps customize it?

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43. Explain View Components and why they are better than Partial Views.

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44. What is Feature Slicing and why is it replacing Layered Architecture in ASP.NET Core?

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45. How does ASP.NET Core prevent request body overconsumption?

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46. What is Razor Class Library (RCL) and why do large companies use it?

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47. Explain how the Model Validation Pipeline works.

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48. What are Filters in MVC and how are the filter types ordered?

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49. What is the difference between Authentication and Authorization in ASP.NET Core?

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50. What is Razor Layout Hierarchy and how does nested view rendering work?

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