[Solved] Given this REST controller method:@RestController public class MyController { @GetMapping("/greet") public String greet() { return... } }What will be the HTTP response body when accessing /greet? | Spring Boot

Spring Boot - REST Controllers

Given this REST controller method:

@RestController
public class MyController {
  @GetMapping("/greet")
  public String greet() {
    return "Hello World";
  }
}

What will be the HTTP response body when accessing /greet?

A{"message":"Hello World"}

BError 404 Not Found

C<html>Hello World</html>

DHello World

Step-by-Step Solution

Solution:

Step 1: Understand the return type and annotation
The method returns a plain String and is inside a @RestController, so Spring Boot sends the string as the HTTP response body directly.
Step 2: Check other options
{"message":"Hello World"} is JSON format which requires an object, C is HTML which is not returned here, and D is an error which does not apply.
Final Answer:
Hello World -> Option D
Quick Check:
String return in @RestController = plain text response [OK]

Quick Trick: String return sends plain text in @RestController [OK]

Common Mistakes:

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