Why NestJS exists - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the core module in a NestJS application.

NestJS

import { [1] } from '@nestjs/common';

Drag options to blanks, or click blank then click option'

AController

BModule

CService

DComponent

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing Module with Controller or Service.

The Module decorator is essential in NestJS to define application modules.

2fill in blank

medium

Complete the code to create a basic controller in NestJS.

NestJS

@Controller('[1]')
export class AppController {}

Drag options to blanks, or click blank then click option'

Aapp

Bhome

Croot

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated route names like 'main' or 'root'.

The controller path is usually named app for the main route.

3fill in blank

hard

Fix the error in the NestJS service provider declaration.

NestJS

@Injectable()
export class [1]Service {}

Drag options to blanks, or click blank then click option'

AAppService

BApp

CAppController

DApplication

Attempts:

3 left

💡 Hint

Common Mistakes

Using controller names or incomplete names without 'Service' suffix.

Service classes in NestJS are usually named with the suffix Service, like AppService.

4fill in blank

hard

Fill both blanks to define a NestJS module with a controller and a provider.

NestJS

@Module({
  controllers: [[1]],
  providers: [[2]],
})
export class AppModule {}

Drag options to blanks, or click blank then click option'

AAppController

BAppService

CMainController

DMainService

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing controller and service names or using unrelated names.

The module should list the AppController in controllers and AppService in providers.

5fill in blank

hard

Fill all three blanks to create a simple NestJS app bootstrap function.

NestJS

async function bootstrap() {
  const app = await NestFactory.[1](AppModule);
  await app.[2](3000);
  console.log('Application is running on port', [3]);
}

Drag options to blanks, or click blank then click option'

Acreate

Blisten

C3000

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong method names like 'start' or missing the port number.

The app is created with create, listens on port 3000, and logs the port number.