DANB CDA Practice Test

DANB CDA Exam at a Glance

DANB CDA Certification

The Certified Dental Assistant (CDA) exam is a crucial step in becoming a dental assistant. DANB’s website provides detailed information about the exam, including eligibility requirements and test preparation tips. Applicants must have a high school diploma or GED certificate, complete a CODA-accredited program of study, and have experience performing expanded functions under the supervision of a licensed dentist. Practice with the free DANB CDA practice test on PracticeTestGeeks (7 questions with answer explanations).

Applicants can request reasonable testing accommodations for their exam. DANB will work with the candidate and the test center to accommodate these needs. Upon passing the CDA exam, the candidate will receive their results at the test center and online through their DANB account.

Get a head start on your exam preparation with this bundled package of four review courses and practice tests. Developed by experts in the field, these practice tests closely follow DANB’s exam outlines and give you a feel for the timed computerized format of the exams. You’ll have unlimited access to these materials for six months. Get started today!

Free DANB CDA Test Study Tools

Interactive DANB CDA Test resources on PracticeTestGeeks, free to start:

• DANB CDA Dental Pharmacology 1 — 7 questions with answer explanations
• DANB CDA Test flashcards — review key terms and concepts card by card
• DANB CDA Test study guide — topic-by-topic overview of what the exam covers
• DANB CDA Test cheat sheet — one-page printable summary for last-minute review

According to Dental Assisting National Board, “DANB's Board establishes passing standards (the exam pass point) using standard psychometric procedures for criterion-referenced exams. A candidate must perform at or above the Board-established standard to pass the exam.”^[4]

Worked examples: how to reason through DANB CDA questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: Which oral lesion is most commonly associated with HIV infection and presents as white, corrugated plaques on the lateral borders of the tongue that cannot be wiped off?

1. Oral candidiasis
2. Hairy leukoplakia
3. Geographic tongue
4. Linea alba

Answer: B. Hairy leukoplakia

Explanation:

Hairy leukoplakia is correct. It appears as white, corrugated plaques on the sides of the tongue and cannot be wiped away. It is linked to Epstein-Barr virus and to a weakened immune system, so it is often seen with HIV.

Oral candidiasis is also common in immunosuppressed patients, but its white patches usually wipe off and leave a red area underneath. Geographic tongue shows red, map-like patches that move over time and is not tied to HIV. Linea alba is a harmless white line on the cheek where the teeth meet, caused by pressure or friction, and it is not a plaque on the tongue.

Rule to remember: a white lesion that does not wipe off and sits on the lateral tongue points to hairy leukoplakia, and one that wipes off points to candidiasis.

Example 2

Question: What is the purpose of an etchant in bonding procedures?

1. To create microscopic roughness on enamel for mechanical retention
2. To sterilize the cavity preparation
3. To numb the tooth nerve
4. To seal the restoration surface

Answer: A. To create microscopic roughness on enamel for mechanical retention

Explanation:

The etchant roughens enamel so the bonding agent can grip it. By dissolving a thin layer of mineral, it leaves tiny pits and channels. Bonding resin flows into them and hardens, which gives mechanical retention.

It does not sterilize the preparation. Cleaning and disinfecting are separate steps, and etching is not antimicrobial treatment. It does not numb the nerve, because that is the job of local anesthetic. It does not seal the restoration surface either. Sealing and finishing happen with other materials after the bond is in place.

Rule to remember: etch to create texture, bond to lock into that texture, and keep each material tied to its purpose. If an option describes numbing or sterilizing, it belongs to a different step.

Example 3

Question: What is the dental assistant's legal role regarding patient prescriptions?

1. Write prescriptions for routine antibiotics
2. Document patient medications and alert the dentist to potential interactions
3. Refill existing prescriptions without dentist approval
4. Administer all medications independently

Answer: B. Document patient medications and alert the dentist to potential interactions

Explanation:

The correct answer is to document the patient's medications and alert the dentist to possible interactions. A dental assistant keeps an accurate medication list in the chart and flags concerns so the dentist can decide what to do.

Writing prescriptions is wrong because prescribing belongs to the licensed dentist, even for routine antibiotics. Refilling an existing prescription without approval is wrong for the same reason: the decision to continue a drug is a clinical judgment the assistant cannot make alone. Administering all medications independently is wrong because medication use must be authorized and supervised, and what an assistant may give depends on state rules.

Rule to remember: assistants record and report, and dentists prescribe and decide.

How to use these practice tests

Start with DANB's own material. Read the CDA page and the candidate handbook so you know how GC, RHS and ICE are laid out, and note anything that depends on your state. Then take one of our sets cold, without notes, to see where you stand.

Use the results to decide where to spend time. If radiation questions are weak, work through the Radiation Health and Safety set. If infection control is the gap, use Infection Control Procedures. For chairside content, begin with General Chairside Assisting, then add Dental Materials and Dental Instruments and Equipment.

After each set, read the explanation for every miss and for every guess that happened to be right. Write the rule behind the answer in your own words, and repeat the set later to check that it stuck. Keep practice sessions timed so you get used to the pace of a long exam. Near test day, run mixed sets from different topics rather than one subject at a time. Our questions are original practice items, so treat them as a way to find gaps and not as a preview of the real exam.

DANB CDA Test Prep

The DANB CDA test is an important exam that can make or break your future plans. This is why it’s so important to study and prepare for the exam.

The CDA credential is earned by passing the RHS, ICE, and GC component exams together. Per DANB’s current published schedule, the combined application fee is $450, the test window is 60 days, and candidates are given 195 minutes to complete 245 questions across the three components. These figures come from DANB’s official exam page and can change, so always confirm current fees and timing at danb.org before you register.

The exam is a computer-based test. Our DANB CDA practice tests follow the exam’s published outlines, and each practice question includes an in-depth answer explanation.

DANB Certified Dental Assistant Salary

Dental assistants have an exciting career that is rewarding both financially and personally. They work closely with patients and need to have good interpersonal skills to ensure the patient is comfortable during procedures. In addition, they need to be organized and able to prepare the appropriate tools for the dentist before each procedure. These qualities are important because the dental assistant’s job is essential to a successful dental practice.

The pay a dental assistant receives depends on the type of practice and location. In general, specialty practices pay more than general practices. In addition, salaries vary by state. While some states don’t require DANB certification, obtaining the credential will increase employment opportunities.

If you are interested in expanding your responsibilities and earning more money, consider becoming an Expanded Functions Dental Assistant (EFDA). This is a step up from the standard dental assistant certification and allows you to perform expanded duties such as coronal polishing or applying sealants. EFDA certification is also tied to higher levels of job satisfaction and career advancement.

Pros and Cons at a Glance

Sample DANB CDA Test Practice Questions

Try these questions from our free DANB CDA Test practice tests. The correct answer and an explanation follow each question.

1. What is the purpose of a biological indicator (spore test) in sterilization monitoring?

   • A. To verify that the sterilizer is effectively killing all microorganisms
   • B. To check the temperature of the autoclave
   • C. To measure the water quality in the sterilizer
   • D. To test the packaging materials for integrity

Answer: A. To verify that the sterilizer is effectively killing all microorganisms

Biological indicators contain highly resistant bacterial spores (typically Geobacillus stearothermophilus) that serve as the gold standard for verifying sterilization effectiveness.

Answer: A. CE credits are automatically applied to recertification records.

A significant benefit of completing Continuing Education (CE) through DANB’s online platform or approved providers is the streamlined process for tracking credits. When CE is completed directly through DANB or reported correctly, the credits are often automatically applied to the certificant's recertification record. This simplifies the renewal process and reduces administrative burden for dental assistants.

Answer: C. They must pay a retake fee and follow the DANB retake policy.

If a candidate fails a DANB exam, they are typically allowed to retake it, but there are specific procedures to follow. This includes paying a retake fee and adhering to DANB's retake policy, which often specifies a waiting period before another attempt can be made. This policy ensures candidates have time to study and prepare adequately for their next attempt.

Answer: B. Certified Dental Assistant (CDA)

The Certified Dental Assistant (CDA) certification is the most widely recognized and respected credential offered by DANB. It signifies a comprehensive level of knowledge and skill across various aspects of dental assisting, making it a benchmark for professional competency in the field. Many states recognize or require the CDA for certain expanded functions, highlighting its broad acceptance.

Take the full DANB CDA Test practice test

Sources & last verified

1. Dental Assisting National Board — number of questions, time limit (official source). “TEST QUESTIONS 245 QUESTIONS” Verified Oct 20, 2026.
2. danbsfprodassets.azureedge.net — exam fee, registration deadline, testing window (official source). “Traditional candidate: $450 $270 $375 $375 Exam fees include the $75 nonrefundable application fee” Verified Oct 20, 2026.
3. Dental Assisting National Board — number of questions, time limit (official source). “TEST QUESTIONS 95 QUESTIONS” Verified Oct 20, 2026 · source checked Oct 18, 2026.
4. danbsfprodassets.azureedge.net — passing score, retake policy, delivery, score release (official source). “DANB's Board establishes passing standards (the exam pass point) using standard psychometric procedures for criterion-referenced exams. A candidate must perform at or above the Board-established…” Verified Oct 20, 2026.
5. danbsfprodassets.azureedge.net — validity (official source). “DANB certification is valid for one year. Renewing your certification annually protects your DANB credential and shows your commitment to the dental assisting profession.” Verified Oct 20, 2026.
6. Dental Assisting National Board — number of questions, time limit (official source). “TEST QUESTIONS 75 QUESTIONS” Verified Oct 20, 2026.
7. Dental Assisting National Board — number of questions, time limit (official source). “TEST QUESTIONS 75 QUESTIONS” Verified Oct 20, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.