Embedded server concept in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a Spring Boot application with an embedded server.

Spring Boot

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.[1](Application.class, args);
    }
}

Drag options to blanks, or click blank then click option'

Aexecute

Bstart

Claunch

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using methods like start() or launch() which do not exist in SpringApplication.

Forgetting to pass the application class as the first argument.

The SpringApplication.run() method starts the Spring Boot application with the embedded server.

2fill in blank

medium

Complete the code to specify the embedded server port in application.properties.

Spring Boot

server.[1]=8081

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Aport

Bhost

Caddress

Durl

Attempts:

3 left

💡 Hint

Common Mistakes

Using server.host or server.address which are not valid for port configuration.

Setting the port in code instead of properties file.

The property server.port sets the port number for the embedded server in Spring Boot.

3fill in blank

hard

Fix the error in the code to create a REST controller with embedded server.

Spring Boot

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String [1]() {
        return "Hello, World!";
    }
}

Drag options to blanks, or click blank then click option'

Ahello

BgetHello

CsayHello

DhelloWorld

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid method names or names that conflict with annotations.

Omitting the method name entirely.

The method name can be any valid Java method name. getHello is a clear name for a GET endpoint.

4fill in blank

hard

Fill both blanks to configure the embedded Tomcat server's max threads and port in application.properties.

Spring Boot

server.[1]=9090
server.tomcat.threads.[2]=200

Drag options to blanks, or click blank then click option'

Aport

Bmax

Cmin-spare

Daddress

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing port with address or host.

Using min-spare instead of max for max thread configuration.

server.port sets the port number, and server.tomcat.threads.max sets the maximum threads for the embedded Tomcat server.

5fill in blank

hard

Fill all three blanks to create a Spring Boot application class with embedded server and a REST endpoint.

Spring Boot

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
@RestController
public class [1] {
    public static void main(String[] args) {
        SpringApplication.[2]([3].class, args);
    }

    @GetMapping("/greet")
    public String greet() {
        return "Greetings from embedded server!";
    }
}

Drag options to blanks, or click blank then click option'

AMyApplication

Brun

CApplication

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching class names in main method and class declaration.

Using incorrect method names instead of run().

The class name MyApplication is used consistently. The SpringApplication.run() method starts the embedded server.