[Solved] Identify the error in this Spring Boot REST controller code: @RestController public class UserController { @GetMapping("/user") public User getUser() { User user = new User(); user.setName("Alice");... | Spring Boot

Spring Boot - REST Controllers

Identify the error in this Spring Boot REST controller code:

@RestController
public class UserController {
    @GetMapping("/user")
    public User getUser() {
        User user = new User();
        user.setName("Alice");
        return user;
    }
}

Assume User is a simple POJO with a name field and getters/setters.

ANo error; code will return User object as JSON

BUser class must be annotated with @Entity

CMissing @ResponseBody annotation on getUser() method

DMissing @RequestMapping on class level

Step-by-Step Solution

Solution:

Step 1: Check @RestController effect
@RestController automatically adds @ResponseBody to all methods, so no need to add it explicitly.
Step 2: Verify User class requirements
User is a POJO; it does not need @Entity unless used with database. Returning it will serialize to JSON automatically.
Final Answer:
No error; code will return User object as JSON -> Option A
Quick Check:
@RestController auto @ResponseBody = No error; code will return User object as JSON [OK]

Quick Trick: @RestController adds @ResponseBody automatically [OK]

Common Mistakes:

Adding unnecessary @ResponseBody on methods
Confusing @Entity with serialization
Thinking class-level @RequestMapping is mandatory

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More Spring Boot Quizzes

Identify the error in this Spring Boot REST controller code:

Step 1: Check @RestController effect

Step 2: Verify User class requirements

Final Answer:

Quick Check:

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