You want to create a custom exception handler that returns a JSON response with error details and HTTP 404 status when a resource is not found. Which approach correctly achieves this in Spring Boot?

hard📝 Conceptual Q8 of 15

Spring Boot - Exception Handling

AHandle exception inside controller method and return null

BThrow NotFoundException and let Spring Boot return default HTML error page

CUse @ControllerAdvice with @ExceptionHandler for NotFoundException returning ResponseEntity with JSON body and status 404

DUse @RestControllerAdvice but return String with error message only

Step-by-Step Solution

Solution:

Step 1: Choose global exception handler annotation
@ControllerAdvice or @RestControllerAdvice can handle exceptions globally.
Step 2: Return ResponseEntity with JSON and 404 status
Returning ResponseEntity with JSON body and HttpStatus.NOT_FOUND provides correct response.
Final Answer:
Use @ControllerAdvice with @ExceptionHandler returning ResponseEntity with JSON and 404 -> Option C
Quick Check:
Global handler with ResponseEntity JSON and 404 status [OK]

Quick Trick: Return ResponseEntity with JSON and 404 in @ControllerAdvice [OK]

Common Mistakes:

Relying on default HTML error page
Returning plain String instead of JSON
Returning null from controller

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You want to create a custom exception handler that returns a JSON response with error details and HTTP 404 status when a resource is not found. Which approach correctly achieves this in Spring Boot?

Step 1: Choose global exception handler annotation

Step 2: Return ResponseEntity with JSON and 404 status

Final Answer:

Quick Check:

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