Why Spring Boot? — Spring Technical Interview Questions & Answers

Faster setup, embedded servers and fewer XML files.

Why Spring Boot?

  • Teams choose Spring Boot to start projects quickly and keep config consistent.
  • Less boilerplate: You write business code first, not long XML setup files.
  • Opinionated defaults: Sensible choices are already made (logging, JSON, server port).
  • Easy packaging: One executable JAR can run anywhere Java runs.
  • Easier onboarding: New developers can run the app with one command.
  • Thinking Boot removes the need to understand Spring basics (DI, beans). You still need them.
  • Mention speed of setup, embedded server, and fewer config files.

Technical Interview Tip: Why Boot: speed + defaults + embedded server.

Code Examples for Why Spring Boot?

Why Spring Boot? — 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";
  }
}

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

How to Explain Why Spring Boot? to an Interviewer

What is Why Spring Boot (sb)?

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

Give one small example of Why Spring Boot (sb).

the smallest Why Spring Boot sb example you can type Faster setup, embedded servers and fewer XML files

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

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

Where do you use Why Spring Boot (sb)?

a small REST app a short Why Spring Boot sb example