If a Spring Boot controller method throws an IllegalArgumentException but no @ExceptionHandler is defined for it, what will happen?

medium📝 Conceptual Q5 of 15

Spring Boot - Exception Handling

If a Spring Boot controller method throws an IllegalArgumentException but no @ExceptionHandler is defined for it, what will happen?

AThe exception will propagate and result in a default error response with HTTP status 500.

BThe exception will be silently ignored and the method will return normally.

CSpring Boot will automatically handle it with a 200 OK response.

DThe application will crash and stop running.

Step-by-Step Solution

Solution:

Step 1: Understand default exception handling
If no handler is defined, Spring Boot returns a default error response with status 500.
Step 2: Eliminate incorrect options
Exceptions are not ignored or converted to 200 OK automatically, nor do they crash the app.
Final Answer:
The exception will propagate and result in a default error response with HTTP status 500. -> Option A
Quick Check:
Unhandled exceptions return 500 error [OK]

Quick Trick: Unhandled exceptions cause HTTP 500 error [OK]

Common Mistakes:

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