Which of the following is a checked exception in Java?Select one:a. NullPointerExceptionb. ArrayIndexOutOfBoundsExceptionc. IOExceptiond. ArithmeticException
Question
Which of the following is a checked exception in Java?Select one:a. NullPointerExceptionb. ArrayIndexOutOfBoundsExceptionc. IOExceptiond. ArithmeticException
Solution
The correct answer is c. IOException.
In Java, a checked exception is any subclass of Exception (excluding class RuntimeException and its subclasses). NullPointerException, ArrayIndexOutOfBoundsException, and ArithmeticException are all subclasses of RuntimeException, and therefore, they are unchecked exceptions. On the other hand, IOException is a subclass of Exception, and therefore, it is a checked exception.
Checked exceptions need to be declared in a method or constructor's throws clause if they can be thrown by the execution of the method or constructor and propagate outside the method or constructor boundary.
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