[Solved] What will happen if a Spring Boot REST controller method returns an object instead of a String? — Ans: The object is automatically converted to JSON or XML in the HTTP response | Spring Boot

Spring Boot - REST Controllers

What will happen if a Spring Boot REST controller method returns an object instead of a String?

AThe server crashes with an exception

BThe method will cause a compile-time error

CThe object is automatically converted to JSON or XML in the HTTP response

DThe object is ignored and an empty response is sent

Step-by-Step Solution

Solution:

Step 1: Understand Spring Boot's automatic conversion
Spring Boot uses message converters to automatically convert returned objects into JSON or XML for REST responses.
Step 2: Check other options
No compile error occurs, the object is not ignored, and the server does not crash just because of returning an object.
Final Answer:
The object is automatically converted to JSON or XML in the HTTP response -> Option C
Quick Check:
Returned objects auto-convert to JSON/XML [OK]

Quick Trick: Objects returned auto-convert to JSON/XML [OK]

Common Mistakes:

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What will happen if a Spring Boot REST controller method returns an object instead of a String?