How does configuration work in ASP.NET Core?

Short answer: ASP.NET Core configuration is flexible, layered, and environment-aware.

Explain a bit more

It reads settings from multiple sources (JSON files, environment variables, command-line rgs, etc.) and merges them into a single configuration object (IConfiguration).

Example code

In Program.cs: var builder = WebApplication.CreateBuilder(args); // Access configuration var appName = builder.Configuration["AppSettings:Name"]; SP.NET Core automatically loads:

Real-world example (ShopNest)

ShopNest admin screens use MVC: controller loads data, Razor view renders HTML, Tag Helpers build forms safely.

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.