NestJS Foundations — Chapter Quiz

Question 1

1

Which file is the entry point of a freshly scaffolded Nest app?

Asrc/app.module.tsBsrc/main.tsCsrc/index.tsDsrc/bootstrap.ts

src/main.ts is generated by the CLI and calls NestFactory.create followed by app.listen().

Question 2

2

What does the @Module decorator's providers array contain?

AHTTP controllersBOther modules to importCClasses that can be injected via DIDPipes and guards only

Providers are anything the Nest DI container can resolve — usually services, repositories, and helpers.

Question 3

3

Which decorator marks a class as a controller that handles HTTP requests?

A@Injectable()B@Module()C@Controller()D@Provider()

@Controller() (optionally with a path prefix) registers the class as a route handler.

Question 4

4

Which HTTP platform does Nest use by default?

AFastifyBExpressCKoaDHapi

Out of the box, Nest builds on Express. You can swap in Fastify via @nestjs/platform-fastify.

Question 5

5

What is the role of the root AppModule?

AIt runs database migrationsBIt is the top of the module graph Nest walks at bootCIt is required to render templatesDIt compiles TypeScript

Nest builds the dependency graph starting from the module you pass to NestFactory.create — usually AppModule.

Question 6

6

A Nest provider must always be decorated with @Injectable().

TTrueFFalse

Most providers are classes with @Injectable(), but you can also register values and factories with custom provider syntax — they have no decorator.

Question 7

7

The CLI command to scaffold a new project is nest ___ my-app.

nest new my-app is the generator command.

Question 8

8

Which of the following are valid @Module properties?

Select all that apply.

AimportsBcontrollersCmiddlewaresDexports

imports, controllers, providers, and exports are the four module properties. Middleware is configured separately via the configure() method.

Test what you learned.