Solution:Step 1: Understand exception inheritanceFileNotFoundException extends IOException, so it matches IOException.class in the handler.Step 2: Confirm handler catches subclasses@ExceptionHandler catches exceptions of the specified types and their subclasses.Final Answer:The handler will catch it

[Solved] Consider this code:@ExceptionHandler({IOException.class, SQLException.... }What will happen if a FileNotFoundException is thrown? | Spring Boot

Spring Boot - Exception Handling

Consider this code:

@ExceptionHandler({IOException.class, SQLException.class})
public ResponseEntity handleIOAndSQL(Exception ex) {
    return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Database or IO error");
}

What will happen if a FileNotFoundException is thrown?

AThe handler will catch it because FileNotFoundException is a subclass of IOException.

BThe handler will not catch it because FileNotFoundException is not listed explicitly.

CThe application will crash with unhandled exception.

DThe handler will catch it only if it is thrown from the same controller.

Step-by-Step Solution

Solution:

Step 1: Understand exception inheritance
FileNotFoundException extends IOException, so it matches IOException.class in the handler.
Step 2: Confirm handler catches subclasses
@ExceptionHandler catches exceptions of the specified types and their subclasses.
Final Answer:
The handler will catch it because FileNotFoundException is a subclass of IOException. -> Option A
Quick Check:
@ExceptionHandler catches subclasses of listed exceptions [OK]

Quick Trick: Exception handlers catch subclasses of specified exceptions [OK]

Common Mistakes:

Thinking only exact classes are caught
Assuming unlisted subclasses are ignored
Believing handler scope affects catching subclasses

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More Spring Boot Quizzes

Consider this code:

Step 1: Understand exception inheritance

Step 2: Confirm handler catches subclasses

Final Answer:

Quick Check:

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