You're right that it is not disqualifying even if the Java expertise is essential for the job and the candidate describes themselves as a Java expert. This was

You're right that it is not disqualifying even if the Java expertise is essential for the job and the candidate describes themselves as a Java expert. This was a single short question among many though. And it's pretty fundamental to Java methinks. BTW, they still got hired and proceeded to be a solid productivity reducer and all round waste of time.