Certified Dental Assistant
Dental Assisting National Board·CDA
cdatest.com is your dedicated CDA practice site: 1,000+ exam-style practice questions, organized across all 3 exam domains. Start with the free practice test — no card required.
- practice questions
- 1,000+
- exam domains
- 3
- practice test
- Free
Exam at a glance
- Exam fee
- Application fee $75 plus exam fee $450 ($525 total)
- Questions on exam
- 245 total multiple-choice questions across three component exams: GC (95 questions, 75 minutes), RHS (75 questions, 60 minutes), ICE (75 questions, 60 minutes)
- Duration
- Total time 195 minutes (3 hours 15 minutes)
- Passing score
- Passing scaled score of 400 on each component (scale 100-900)
- Validity
- Certification requires annual renewal with 12 continuing education hours. Components can be taken together or separately, all must be passed within a 5-year window
Published exam facts, from the official outline.
What’s on the CDA exam
- General Chairside Assisting (39% - 95 questions)
- Radiation Health and Safety (31% - 75 questions)
- Infection Control (31% - 75 questions)
Official exam blueprint domains — your practice bank mirrors this outline.
The CDA question bank follows the official exam blueprint across 3 domains, so your practice mirrors the real outline — and shows you exactly where you’re weak. See the full blueprint on cdatest.com →
Your CDA prep is one click away
The free CDA practice test, the full 1,000+ question bank and your readiness score — all on cdatest.com.
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