IDEX is an acronym for ‘interior design examination’. It is the official and only exam required to become a “Certified Interior Designer” in the state of California.
The exam was written by Castle Worldwide, Inc. for the California Council for Interior Design Certification (CCIDC).
IDEX®California exam is comprised of 150 multiple-choice questions, it is closed book and takes 3 hours.
The exam fee is $300 plus a testing center fee of $75.