Which of the following method signatures is valid for an exception handler in a Spring Boot controller?

easy📝 Conceptual Q2 of 15

Spring Boot - Exception Handling

Apublic int handleException(Exception ex, String message)

Bpublic void handleException()

Cpublic String handleException(HttpServletRequest request)

Dpublic ResponseEntity<String> handleException(NullPointerException ex)

Step-by-Step Solution

Solution:

Step 1: Check method parameters
An exception handler method typically accepts the exception type it handles as a parameter.
Step 2: Check return type
Returning ResponseEntity or a response body type is valid for sending HTTP responses.
Step 3: Validate options
public ResponseEntity handleException(NullPointerException ex) matches the expected signature with exception parameter and response return type.
Final Answer:
public ResponseEntity handleException(NullPointerException ex) -> Option D
Quick Check:
Exception parameter required [OK]

Quick Trick: Exception handler methods need exception parameter [OK]

Common Mistakes:

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