Spring Bean Lifecycle — Spring Technical Interview Questions & Answers

Instantiation, dependency injection, init and destroy callbacks.

Spring Bean Lifecycle

  • Bean Lifecycle (spring) is a Spring topic. In plain words you use it for a short Bean Lifecycle spring example in a small REST app. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest Bean Lifecycle spring example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Bean Lifecycle (spring).
  • From the example next to this theory: Instantiation, dependency injection, init and destroy callbacks.
  • Trap: only saying “Bean Lifecycle spring” with no example. Fix that before you talk about advanced Spring.
  • Viva: what is Bean Lifecycle (spring)? Then show the smallest Bean Lifecycle spring example you can type. Then name the trap.

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

Code Examples for Spring Bean Lifecycle

Spring Bean Lifecycle — working example

// Topic: Spring Bean Lifecycle
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 Bean Lifecycle";
  }
}

Spring Bean Lifecycle: GET /api/topic returns this title string.

How to Explain Spring Bean Lifecycle to an Interviewer

What is Bean Lifecycle (spring)?

Used for a short Bean Lifecycle spring example a small REST app Not just the heading

Give one small example of Bean Lifecycle (spring).

the smallest Bean Lifecycle spring example you can type Instantiation, dependency injection, init and destroy callbacks

What mistake do beginners make with Bean Lifecycle (spring)?

only saying “Bean Lifecycle spring” with no example Show the fix

Where do you use Bean Lifecycle (spring)?

a small REST app a short Bean Lifecycle spring example