Feign Clients — Spring Technical Interview Questions & Answers

Declarative, interface-based HTTP clients.

Feign Clients

  • Feign Clients (cloud) is a Spring topic. In plain words you use it for a short Feign Clients cloud example in a small REST app. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Feign Clients cloud example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Feign Clients (cloud).
  • From the example next to this theory: Declarative, interface-based HTTP clients.
  • Trap: only saying “Feign Clients cloud” with no example. Fix that before you talk about advanced Spring.
  • Viva: what is Feign Clients (cloud)? Then show the smallest Feign Clients cloud example you can type. Then name the trap.

Technical Interview Tip: What is Feign Clients (cloud)? Show this: the smallest Feign Clients cloud example you can type. Trap: only saying “Feign Clients cloud” with no example.

Code Examples for Feign Clients

Feign Clients — working example

// Topic: Feign Clients
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: Feign Clients";
  }
}

Feign Clients: GET /api/topic returns this title string.

How to Explain Feign Clients to an Interviewer

What is Feign Clients (cloud)?

Used for a short Feign Clients cloud example a small REST app Not just the heading

Give one small example of Feign Clients (cloud).

the smallest Feign Clients cloud example you can type Declarative, interface-based HTTP clients

What mistake do beginners make with Feign Clients (cloud)?

only saying “Feign Clients cloud” with no example Show the fix

Where do you use Feign Clients (cloud)?

a small REST app a short Feign Clients cloud example