Which exception indicates that an array has been accessed with an illegal index?

• A. ClassCastException
• B. ArrayIndexOutOfBoundsException
• C. NoSuchElementException
• D. StringIndexOutOfBoundsException

Answer: (B)

The exception that indicates that an array has been accessed with an illegal index is indeed the ArrayIndexOutOfBoundsException. This exception is thrown at runtime when an attempt is made to access an element of an array using an index that is either negative or greater than or equal to the size of the array.

For instance, if an array contains 10 elements, attempting to access the 11th element (index 10) or any negative index will trigger this exception. This is a built-in safeguard in the Java programming language that helps prevent errors that can lead to unpredictable behaviors in the program.

Understanding this exception is crucial for developers, particularly for those involved in testing where verifying array accesses is common. It ensures that any off-by-one errors or wrong index calculations are caught during execution, allowing for debugging and correction of the code.

The other options represent different scenarios; for example, ClassCastException arises when an invalid cast is attempted, NoSuchElementException indicates that an attempt to access an element of a collection that is empty has been made, and StringIndexOutOfBoundsException occurs specifically for strings when trying to access an invalid index within a string rather than an array. Each exception has its specific context and usage, but for array access