Spring Cloud Spring Cloud Gateway & Load Balancing

Question 1

What replaces the deprecated Netflix Zuul as the recommended API gateway in Spring Cloud?

Accepted Answer

Spring Cloud Gateway

Answer

Spring Cloud Consul Gateway

Answer

Spring Cloud Router

Answer

Spring Cloud Proxy

Question 2

Which programming model does Spring Cloud Gateway use for reactive, non-blocking request processing?

Accepted Answer

Spring WebFlux with Project Reactor

Answer

Spring MVC with Tomcat thread pool

Answer

Netty with Vert.x event loop

Answer

Akka HTTP with actor model

Question 3

In Spring Cloud Gateway, what is a 'Predicate' used for?

Accepted Answer

Matching incoming requests to determine which route to apply

Answer

Modifying the request or response headers

Answer

Performing authentication and authorization checks

Answer

Balancing load across downstream service instances

Question 4

What is the purpose of a 'Filter' in Spring Cloud Gateway?

Accepted Answer

Modifying the incoming request or outgoing response before/after routing

Answer

Selecting which downstream instance receives a request

Answer

Caching responses from downstream services

Answer

Discovering available routes from the service registry

Question 5

Which Spring Cloud Gateway predicate routes requests where the path matches `/api/orders/**`?

Accepted Answer

Path=/api/orders/**

Answer

PathVariable=/api/orders/**

Answer

Route=/api/orders/**

Answer

Match=/api/orders/**

Question 6

How does Spring Cloud Gateway integrate with service discovery to route requests to registered services by name?

Accepted Answer

Via the lb:// URI scheme which triggers client-side load balancing through DiscoveryClient

Answer

By hardcoding service IPs in route configuration

Answer

By querying the DNS server for service IP resolution

Answer

Through a sidecar proxy that intercepts all traffic