Java - Custom Exceptions
You want to create a custom unchecked exception named
InvalidDataException. Which is the correct way to define it?You want to create a custom unchecked exception named InvalidDataException. Which is the correct way to define it?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand checked vs unchecked exceptions
Unchecked exceptions extendRuntimeException, checked exceptions extendException.Step 2: Analyze each option
public class InvalidDataException extends RuntimeException { public InvalidDataException(String message) { super(message); } } correctly extendsRuntimeExceptionwith proper constructor. public class InvalidDataException extends Exception { public InvalidDataException(String message) { super(message); } } creates a checked exception. public class InvalidDataException implements RuntimeException { public InvalidDataException(String message) { super(message); } } tries to implement an exception class, which is invalid. public class InvalidDataException extends Throwable { public InvalidDataException(String message) { super(message); } } extendsThrowabledirectly, which is not recommended for custom exceptions.Final Answer:
public class InvalidDataException extends RuntimeException { public InvalidDataException(String message) { super(message); } } -> Option BQuick Check:
Unchecked exception = extends RuntimeException [OK]
Quick Trick: Unchecked exceptions extend RuntimeException, not Exception [OK]
Common Mistakes:
- Extending Exception for unchecked exceptions
- Trying to implement exception classes
- Extending Throwable directly
Master "Custom Exceptions" in Java
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Java Quizzes