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IDPX Exam Questions & Answers

Interior Design Professional Exam  •  CIDQ

175 Questions 240 min Updated Sep 2026 99% Pass Rate
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Sample IDPX Questions

Practice with real exam-style questions, each with the verified correct answer and explanation.

Q1 MultipleChoice

In an existing non-sprinklered multi-tenant building, a client will be converting a suite from a bank into a restaurant serving more than 49 persons. What fire rating is REQUIRED between the new tenant and the existing adjacent insurance office?

Correct Answer: B
Q2 MultipleChoice

What is the rentable square footage [m] of a building?

Correct Answer: C
Q3 MultipleChoice

What is the term for a full-scale representation of products or construction features that may be required in bid (tender) documents?

Correct Answer: C
Q4 MultipleChoice

What floor finish would BEST support a passive solar design strategy in a hot arid climate?

Correct Answer: D
Q5 MultipleChoice

A project is utilizing existing millwork with new custom countertops. Who is responsible to field verify the existing conditions to generate shop drawings for the new countertops?

Correct Answer: B

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Frequently Asked Questions

The IDPX (Interior Design Professional Exam) is a comprehensive certification exam administered by CIDQ (Council for Interior Design Qualification) that assesses the knowledge and competency of interior design professionals. It is a requirement for becoming a certified interior designer (NCIDQ certification) in most jurisdictions across North America.

The IDPX exam covers four major content areas: programming and analysis, schematic design, design development, and contract documents and administration. These topics test a candidate's ability to manage interior design projects from initial client needs assessment through project completion and evaluation.

The IDPX exam consists of 200 multiple-choice questions that must be completed within 7 hours total (including breaks). The exam is divided into two sessions of approximately 3.5 hours each to accommodate the large number of questions.

To be eligible for the IDPX exam, candidates must have a combination of education and work experience in interior design that meets CIDQ standards, typically requiring a degree from an accredited interior design program plus several years of professional experience. Specific requirements vary by jurisdiction but generally require either a degree plus 2 years of experience or equivalent combinations of education and experience.

The IDPX exam is scored on a scale and candidates must achieve a minimum passing score set by CIDQ to obtain certification. The exact passing score and detailed score reporting may vary, but CIDQ ensures the exam maintains consistent standards across all test administrations and jurisdictions.
Exam Details
  • Exam CodeIDPX
  • VendorCIDQ
  • Total Questions175
  • Duration240 min
  • LanguageEnglish
  • Last UpdatedSep 2, 2026
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