API Documentation with Swagger/OpenAPI — Spring Technical Interview Questions & Answers

Auto-generating interactive API docs.

API Documentation with Swagger/OpenAPI

  • API Documentation with Swagger/OpenAPI (sb rest) is a Spring topic. In plain words you use it for GET /api/marks/{roll} in a campus API. Don’t start with a slogan — start with that picture.
  • Smallest example: @RestController + service call. Type it, run it, and say what you see. If you can do that from memory, you know API Documentation with Swagger/OpenAPI (sb rest).
  • From the example next to this theory: Auto-generating interactive API docs.
  • Trap: business logic inside the controller. Fix that before you talk about advanced Spring.
  • Viva: what is API Documentation with Swagger/OpenAPI (sb rest)? Then show @RestController + service call. Then name the trap.

Technical Interview Tip: What is API Documentation with Swagger/OpenAPI (sb rest)? Show this: @RestController + service call. Trap: business logic inside the controller.

Code Examples for API Documentation with Swagger/OpenAPI

API Documentation with Swagger/OpenAPI — working example

// Topic: API Documentation with Swagger/OpenAPI
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 Documentation with Swagger/OpenAPI";
  }
}

API Documentation with Swagger/OpenAPI: GET /api/topic returns this title string.

How to Explain API Documentation with Swagger/OpenAPI to an Interviewer

What is API Documentation with Swagger/OpenAPI (sb rest)?

Used for GET /api/marks/{roll} a campus API Not just the heading

Give one small example of API Documentation with Swagger/OpenAPI (sb rest).

@RestController + service call Auto-generating interactive API docs

What mistake do beginners make with API Documentation with Swagger/OpenAPI (sb rest)?

business logic inside the controller Show the fix

Where do you use API Documentation with Swagger/OpenAPI (sb rest)?

a campus API GET /api/marks/{roll}