Deploying a Spring Boot App — Spring Technical Interview Questions & Answers

WAR vs embedded-server JAR deployment.

Deploying a Spring Boot App

  • Most Boot apps deploy as an executable JAR with an embedded server.
  • Alternative: WAR for an external application server (less common for new Boot apps).
  • Set profiles and secrets via environment variables in real deployments.
  • Health checks (Actuator) help orchestrators know if the app is ready.
  • JAR + java -jar is the default story unless they ask about WAR.

Technical Interview Tip: Prefer fat JAR unless company standard is external Tomcat.

Code Examples for Deploying a Spring Boot App

Deploying a Spring Boot App — working example

// Topic: Deploying a Spring Boot App
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: Deploying a Spring Boot App";
  }
}

Deploying a Spring Boot App: GET /api/topic returns this title string.

How to Explain Deploying a Spring Boot App to an Interviewer

What is Deploying a Spring Boot App (sb misc deployment)?

Used for a short Deploying a Spring Boot App sb misc deployment example a small REST app Not just the heading

Give one small example of Deploying a Spring Boot App (sb misc deployment).

the smallest Deploying a Spring Boot App sb misc deployment example you can type WAR vs embedded-server JAR deployment

What mistake do beginners make with Deploying a Spring Boot App (sb misc deployment)?

only saying “Deploying a Spring Boot App sb misc deployment” with no example Show the fix

Where do you use Deploying a Spring Boot App (sb misc deployment)?

a small REST app a short Deploying a Spring Boot App sb misc deployment example