Spring Boot vs Spring Framework — Spring Technical Interview Questions & Answers

Boot builds on Spring — it doesn't replace it.

Spring Boot vs Spring Framework

  • Spring is the framework; Spring Boot is a helper layer on top of Spring.
  • Spring Framework: Core IoC, AOP, MVC, data access — powerful but more manual setup.
  • Spring Boot: Turns those modules on with auto-config and starters.
  • You are not choosing one OR the other: every Boot app is still a Spring app.
  • Config difference: Plain Spring often needs more XML/Java config; Boot infers most of it.
  • Saying Boot replaced Spring. Boot uses Spring.
  • Boot builds on Spring; it reduces configuration overhead.

Technical Interview Tip: Clarify: Boot apps are Spring apps with less setup.

Code Examples for Spring Boot vs Spring Framework

Spring Boot vs Spring Framework — working example

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication // config + auto-config + component scan
public class DemoApplication {
  public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
  }
}

@RestController
class HelloController {
  @GetMapping("/api/hello")
  String hello() {
    return "Hello Spring Boot";
  }
}

Spring Boot vs Spring Framework — spring Boot is opinionated Spring: starters + auto-configuration + embedded server for fast apps.

How to Explain Spring Boot vs Spring Framework to an Interviewer

What is Boot vs Spring Framework (sb)?

Used for a short Boot vs Spring Framework sb example a small REST app Not just the heading

Give one small example of Boot vs Spring Framework (sb).

the smallest Boot vs Spring Framework sb example you can type Boot builds on Spring — it doesn't replace it

What mistake do beginners make with Boot vs Spring Framework (sb)?

only saying “Boot vs Spring Framework sb” with no example Show the fix

Where do you use Boot vs Spring Framework (sb)?

a small REST app a short Boot vs Spring Framework sb example