The Interior Design Fundamentals Exam (IDFX) tests your knowledge of: Building Systems. Construction Standards. Design Application. You’ll have three hours to complete the 125 question multiple-choice exam IDFX.Click to see full answer. Regarding this, what is Ncidq stands for? National Council for Interior Design Qualification Subsequently, question is, how often is the Ncidq exam given? every 5 years Consequently, how do I pass the Ncidq exam? Follow our daily lesson plan so you can pass the first time. Master each section so you can stay on track. Taking the NCIDQ Exam is like running a marathon. Pass the new computer-based Practicum. Prepare for the computer-based NCIDQ Exams. Cut the guess-work and focus on what’s essential. Are or Ncidq exams?To earn certification, qualified interior designers can apply to take the NCIDQ Examination. The three separate sections of the NCIDQ Exam are: the Fundamentals Exam (IDFX), the Professional Exam (IDPX), and the Practicum Exam (PRAC). All three sections focus entirely on public health, safety and welfare.