Auth, APIs & Real-Time — Chapter Quiz

Question 1

1

Which Passport strategy is the standard choice for stateless API authentication?

Apassport-localBpassport-jwtCpassport-google-oauthDpassport-session

passport-jwt validates a signed token from the Authorization header and is the default for stateless APIs.

Question 2

2

What does @nestjs/swagger generate from your code?

ADatabase migrationsBAn OpenAPI document and Swagger UICA Postman collectionDA typed client SDK

It scans decorators and DTOs to build an OpenAPI spec, which Swagger UI renders.

Question 3

3

Which decorator marks a class as a WebSocket gateway?

A@SubscribeMessageB@WebSocketGatewayC@ServerD@Socket

@WebSocketGateway() registers the class. Inside, @SubscribeMessage decorates handler methods for specific events.

Question 4

4

In Nest GraphQL code-first, what does @ObjectType() do?

ARegisters an injectable serviceBDeclares a GraphQL output typeCGenerates a TypeORM entityDDefines an input type

@ObjectType() (with @Field() properties) declares an output type for the schema.

Question 5

5

Server-Sent Events from a Nest handler are returned as

AA plain stringBAn Observable that emits message eventsCA WebSocket frameDA Promise that resolves once

The @Sse() decorator expects the handler to return an Observable; Nest serialises each emission as an SSE event.

Question 6

6

Nest microservices support transports like TCP, Redis, NATS, and gRPC.

TTrueFFalse

The microservices package ships adapters for all of these, plus Kafka, MQTT, and RabbitMQ.

Question 7

7

Role-based access control in Nest typically combines a Roles decorator with the ___ helper.

A @Roles() decorator (built on SetMetadata) plus a RolesGuard that reads metadata with the Reflector is the textbook RBAC pattern.

Question 8

8

Which decorators are part of @nestjs/swagger?

Select all that apply.

A@ApiTagsB@ApiPropertyC@ApiOperationD@Inject

@ApiTags, @ApiProperty, and @ApiOperation are Swagger decorators. @Inject comes from @nestjs/common.

Test what you learned.