IDFX
Published- Published lessons
- 82
- Study modules
- 8
- Practice questions
- 934
- Timed-exam questions
- 1035
- Total study questions
- 1969
- Flashcards
- 376
- Full-length timed exams
- 9
Published lessons, practice questions and a timed practice exam are live today.
NCIDQ EXAM PREPARATION
Prepare with clarity.
Design with confidence.
Build your knowledge for the IDFX, IDIX, and IDPX exams with self-paced lessons, practice questions, and focused study tools.
$99 / month USD · new memberships · includes IDFX, IDIX and IDPX
New memberships are $99/month, down from the previous $149/month — $50/month less.
Billed monthly until you cancel. Cancel any time from your account; ordinary cancellation keeps access to the end of the paid period. A first-payment refund approved under the seven-day guarantee instead cancels the subscription and ends paid access. Creating an account is free — you are not charged until you complete checkout.
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Prepare. Practice. Progress.
3 of 3
Programs published
82
Published IDFX lessons
934
IDFX practice questions
Counts are taken directly from the published content library and update as content is released. All study content is written in-house and is released only after the owner records a content confirmation. Anything not yet confirmed stays unpublished.
The exam sequence
Three programs. One connected system.
Each program is organised around the content areas of the current CIDQ blueprint for that examination. Availability below reflects what is published in the library today.
01 / IDFXPublished
Foundational knowledge
Interior Design Fundamentals
Existing conditions, pre-design, programming, space planning, preliminary FF&E and finishes, and schematics.
82 lessons · 934 practice questions · 1035 timed-exam questions
Program detail
02 / IDIXPublished
Technical execution
Interior Design Implementation
Construction documents, specifications, coordination, procurement, and project delivery.
100 lessons · 1100 practice questions · 1170 timed-exam questions
Program detail
03 / IDPXPublished
Professional judgment
Interior Design Professional
Construction administration and project management: feasibility, schedules, budgets, contracts, procurement, permitting, site observation and close-out.
90 lessons · 900 practice questions · 1035 timed-exam questions
Program detail
Try the study loop
A short, interactive walkthrough.
Demo activity is fictional and stays in this page only. The lesson and question are the real public IDFX samples; nothing is saved.
Included today
Exactly what is in the library right now.
These figures are read from the published content library. Draft, inactive and under-review material is excluded, and a question counts once no matter how many study sets use it.
IDIX
Published- Published lessons
- 100
- Study modules
- 7
- Practice questions
- 1100
- Timed-exam questions
- 1170
- Total study questions
- 2270
- Flashcards
- 400
- Full-length timed exams
- 9
Published lessons, practice questions and timed practice exams are live today.
IDPX
Published- Published lessons
- 90
- Study modules
- 7
- Practice questions
- 900
- Timed-exam questions
- 1035
- Total study questions
- 1935
- Flashcards
- 360
- Full-length timed exams
- 9
Published lessons, practice questions and timed practice exams are live today.
Readiness, made visible
Know where to focus next.
Study Readiness is a weighted average of your first-attempt practice accuracy across content areas, shown separately for each program once there is enough evidence. Lesson completion and flashcards do not change it.
Performance by content area
Weak-area recommendations
Practice-exam pacing and trends
Study Readiness is an internal study-planning metric calculated from your activity and practice accuracy on this platform. It is not a CIDQ score, not a validated pass probability, and not a prediction of your exam result.
IDFX Study Readiness · illustrative demo
Example student view
Programming78%
Existing conditions63%
Space planning74%
Readiness trend
W01W07
Recommended next
Complete a focused set on your weakest content area before your next full practice exam.
Illustrative demo data. Figures shown are examples of the interface, not real student results.
SAMPLE QUESTION
IDFXSchematics
During schematic design, the designer discovers that a proposed furniture layout reduces the required clear path leading toward an exit. What is the BEST response?
ARevise the layout so required circulation and life-safety provisions are maintained
BKeep the furniture layout because schematic drawings are preliminary
CWait until construction documents to address the conflict
DAsk the furniture installer to resolve the issue during installation
Answers are checked only after you submit.Try all 10 sample questions
Practice with purpose
Questions that train professional judgment.
Every practice question is graded on the server, keeps the answer hidden until you submit, and then shows the explanation and the exam content area it covers. Try ten original IDFX questions free — no account needed.
Active · included in membership
A tutor built for the way designers reason.
The AI Tutor is included in membership on lessons and practice questions. It explains concepts, the published explanation and the reference — it will never decide or change the approved correct answer, and it has no access to confidential NCIDQ exam content.
AI Tutor
NCIDQ study assistant
Help me understand when occupant load uses gross area versus net area.
Start by asking what space is actually occupied for the activity. Net area excludes circulation and support spaces; gross area includes the full floor area within exterior walls. Which one applies depends on the factor listed in the adopted code.
Explanations · comparisons · study promptsILLUSTRATIVE EXAMPLE
Membership
One membership for the NCIDQ sequence.
IDFX, IDIX and IDPX lessons, practice questions and timed practice sets — all included in one membership.
NCIDQ Complete
$99USD per month · new memberships
New memberships are $99/month, down from the previous $149/month — $50/month less.
- Structured lessons with key concepts and flashcards
- Practice questions with explanations and references
- Timed practice exams with saved attempts and review
- Study Readiness and weak-area analytics
- AI Tutor on practice questions and lessons
- IDIX and IDPX curriculum
Interior Prep Studio material is authored and reviewed by K. Smith, licensed engineer, and E. Smith, licensed architect. Authors and reviewers
Free public samples · no account or payment required.
Cancel any time — ordinary cancellation keeps access until the end of the billing period you have paid for. A refund approved under the seven-day guarantee instead cancels your subscription and ends paid access. Interior Prep Studio is an independent study provider. It is not affiliated with, endorsed by, or licensed by CIDQ.
Questions, answered
Plan with clarity.
The essentials to know before beginning your study program.
Your next professional milestone
Build a study practice you can sustain.
Membership is open now. Create a free account, set your weekly goal, and start your IDFX, IDIX or IDPX preparation.
Create your account
Interior Prep Studio material is authored and reviewed by K. Smith, licensed engineer, and E. Smith, licensed architect. Authors and reviewers
Free public samples · no account or payment required.