Spring Cloud Gateway — Spring Technical Interview Questions & Answers

A reactive API gateway for routing and filtering requests.

Spring Cloud Gateway

  • Cloud Gateway is a Spring topic. In plain words you use it for a short Cloud Gateway example in a small REST app. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Cloud Gateway example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Cloud Gateway.
  • From the example next to this theory: A reactive API gateway for routing and filtering requests.
  • Trap: only saying “Cloud Gateway” with no example. Fix that before you talk about advanced Spring.
  • Viva: what is Cloud Gateway? Then show the smallest Cloud Gateway example you can type. Then name the trap.

Technical Interview Tip: What is Cloud Gateway? Show this: the smallest Cloud Gateway example you can type. Trap: only saying “Cloud Gateway” with no example.

Code Examples for Spring Cloud Gateway

Spring Cloud Gateway — working example

// Topic: Spring Cloud Gateway
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
class TopicController {
  @GetMapping("/api/topic")
  String topic() {
    return "Spring Boot: Spring Cloud Gateway";
  }
}

Spring Cloud Gateway: GET /api/topic returns this title string.

How to Explain Spring Cloud Gateway to an Interviewer

What is Cloud Gateway?

Used for a short Cloud Gateway example a small REST app Not just the heading

Give one small example of Cloud Gateway.

the smallest Cloud Gateway example you can type A reactive API gateway for routing and filtering requests

What mistake do beginners make with Cloud Gateway?

only saying “Cloud Gateway” with no example Show the fix

Where do you use Cloud Gateway?

a small REST app a short Cloud Gateway example