NestJS NestJS Architecture & Design Patterns

Question 1

Which NestJS decorator is used to define a class as a module?

Accepted Answer

@Module()

Answer

@Injectable()

Answer

@Controller()

Answer

@Component()

Question 2

What is the purpose of the `providers` array in the @Module() decorator?

Accepted Answer

To register services that can be injected within the module

Answer

To list imported modules

Answer

To declare HTTP controllers

Answer

To export public APIs

Question 3

Which pattern does NestJS primarily use for organizing application logic?

Accepted Answer

Modular architecture with DI

Answer

MVC

Answer

MVVM

Answer

Microkernel

Question 4

What does the `exports` array in @Module() control?

Accepted Answer

Which providers can be used by other modules

Answer

Which controllers are public

Answer

The order of middleware execution

Answer

Which guards are applied globally

Question 5

Which NestJS concept allows a module to be shared across the entire application without re-importing?

Accepted Answer

Global Module

Answer

Dynamic Module

Answer

Feature Module

Answer

Core Module

Question 6

What is the role of the `AppModule` in a NestJS application?

Accepted Answer

It serves as the root module that bootstraps the entire application

Answer

It handles HTTP requests directly

Answer

It defines global guards

Answer

It manages database connections