See the definition in you FAR/AIM Pilot Controller Glossary:
"It is designated on Government charts by the Maltese Cross symbol for nonprecision approaches and the lightining bolt symbol for precision approaches."
This is furtter backed up by the fact that such a response is the correct answer to a question on an LAX ILS approach plate used on the knowledge test. (FAA question number 4642; under the 2006 edition of the Gleim test prep it is question 124 in unit 6, page 229).
Good luck on your interview!
TM