API Gateway Pattern — Spring Technical Interview Questions & Answers

A single entry point that routes to backend services.

API Gateway Pattern

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

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

Code Examples for API Gateway Pattern

API Gateway Pattern — working example

// Topic: API Gateway Pattern
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: API Gateway Pattern";
  }
}

API Gateway Pattern: GET /api/topic returns this title string.

How to Explain API Gateway Pattern to an Interviewer

What is API Gateway Pattern (micro)?

Used for a short API Gateway Pattern micro example a small REST app Not just the heading

Give one small example of API Gateway Pattern (micro).

the smallest API Gateway Pattern micro example you can type A single entry point that routes to backend services

What mistake do beginners make with API Gateway Pattern (micro)?

only saying “API Gateway Pattern micro” with no example Show the fix

Where do you use API Gateway Pattern (micro)?

a small REST app a short API Gateway Pattern micro example