What is the role of NgModule in Angular?

Short answer: @NgModule is a decorator that defines a module. It declares which components, directives, and pipes belong to the module. It imports other modules needed for its components. It exports components/modules to make them available elsewhere. It configures services/providers scoped to the module.

Example code

@NgModule({ declarations: [MyComponent, MyDirective], imports: [CommonModule], exports: [MyComponent] }) export class MyModule {}

Real-world example (ShopNest)

ShopNest admin can be built in Angular with modules/components, services for API calls, and reactive forms for product edit.

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.