[Solved] Given this Spring Boot controller method, what will be the response when a GET request is made to /hello? @GetMapping("/hello") public String sayHello() { return "Hello, Spring!"; } | Spring Boot

Spring Boot - Request and Response Handling

Given this Spring Boot controller method, what will be the response when a GET request is made to /hello?

@GetMapping("/hello")
public String sayHello() {
    return "Hello, Spring!";
}

AThe plain text 'Hello, Spring!' as the HTTP response body

BA JSON object with message 'Hello, Spring!'

CA redirect to another URL

DAn error because no ResponseEntity is returned

Step-by-Step Solution

Solution:

Step 1: Analyze the controller method return type
The method returns a String, which by default is sent as plain text in the HTTP response body.
Step 2: Understand Spring Boot default behavior for String returns
Without annotations like @ResponseBody missing, Spring Boot treats String return as response content, not a view name.
Final Answer:
The plain text 'Hello, Spring!' as the HTTP response body -> Option A
Quick Check:
String return sends plain text response = B [OK]

Quick Trick: String return sends plain text unless annotated otherwise [OK]

Common Mistakes:

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Given this Spring Boot controller method, what will be the response when a GET request is made to /hello?