Spring Boot Spring Boot WebFlux and Reactive Programming

Question 1

Which Spring Boot starter is required to use Spring WebFlux?

Accepted Answer

spring-boot-starter-webflux

Answer

spring-boot-starter-web

Answer

spring-boot-starter-reactor

Answer

spring-boot-starter-async

Question 2

What is the reactive equivalent of Spring MVC's RestTemplate in Spring WebFlux?

Accepted Answer

WebClient

Answer

AsyncRestTemplate

Answer

HttpClient

Answer

ReactiveTemplate

Question 3

Which two types does Project Reactor provide for reactive streams in Spring WebFlux?

Accepted Answer

Flux and Mono

Answer

Observable and Single

Answer

Publisher and Subscriber

Answer

Stream and Optional

Question 4

What default embedded server does Spring WebFlux use instead of Tomcat?

Accepted Answer

Netty

Answer

Jetty

Answer

Undertow

Answer

GlassFish

Question 5

Which annotation is used to define a functional-style route handler bean in Spring WebFlux?

Accepted Answer

@RouterFunction

Answer

@RequestMapping

Answer

@RouteHandler

Answer

@WebFluxRoute

Question 6

What does the `@EnableWebFlux` annotation do when added to a configuration class?

Accepted Answer

Imports the WebFlux configuration from DelegatingWebFluxConfiguration

Answer

Enables Tomcat for reactive support

Answer

Registers all reactive repositories

Answer

Disables Spring MVC auto-configuration