Is OutOfMemoryError an unchecked exception during compilation?

Yes, OutOfMemoryError in Java is a runtime error (Error) that is unchecked by the compiler. This is because Error and its subclasses represent serious problems that are usually not recoverable programmatically.

Unlike checked exceptions, which must be explicitly handled or declared in the method signature, OutOfMemoryError does not require such handling, and it is usually not caught, allowing the application to terminate or restart.