- How the CNA Knowledge Exam Is Structured
- Domain 1: Activities of Daily Living (22%)
- Domain 2: Basic Nursing Skills (35%)
- Domain 3: Self-Care and Independence (7%)
- Domain 4: Emotional and Mental Health Needs (8%)
- Domain 5: Spiritual and Cultural Needs (2%)
- Domain 6: Communication (7%)
- Domain 7: Client Rights (8%)
- Domain 8: Legal and Ethical Behavior (5%)
- Domain 9: Member of the Health Care Team (6%)
- Domain Weighting at a Glance
- Mapping the Domains to a Study Schedule
- Frequently Asked Questions
- The NNAAP knowledge exam covers 9 content domains, with Basic Nursing Skills weighted heaviest at 35%.
- Activities of Daily Living is the second-largest domain at 22%, making these two areas over half the written exam.
- The written exam has 70 items (60 scored, 10 pretest) with a two-hour time limit.
- Spiritual and Cultural Needs is the smallest domain at just 2%, so don't overinvest study time there.
How the CNA Knowledge Exam Is Structured
Before diving into the nine content domains, it helps to understand the exam format they live inside. The current National Nurse Aide Assessment Program (NNAAP), developed and managed by Credentia Nurse Aide LLC, requires two components: a knowledge examination and a hands-on Skills Evaluation. Every question on the written or oral portion is drawn from one of the nine domains listed below, and understanding how much weight each domain carries is the single most useful thing you can do before you start reviewing content.
The written knowledge exam contains 70 multiple-choice items - 60 that count toward your score and 10 unscored pretest items mixed in without identification - and candidates get two hours to complete it. Candidates who need the oral format instead answer 60 multiple-choice items plus 10 word-recognition items, also within a two-hour window. Some jurisdictions administer the knowledge exam through live online proctoring, which is worth confirming with your state's nurse aide registry before test day. For a full walkthrough of eligibility rules before you can even sit for either exam component, see our CNA Requirements guide.
Domain 1: Activities of Daily Living (22%)
Activities of Daily Living (ADLs) is the second-heaviest domain and covers the hands-on personal care tasks that make up most of a CNA's actual shift work. Expect scenario-based questions that ask you to identify the correct sequence or the safest approach rather than pure definitions.
Activities of Daily Living
Candidates must know how to assist residents with the daily tasks they can no longer fully perform independently, always prioritizing safety and dignity.
- Bathing, grooming, oral care, and dressing techniques for residents with varying mobility levels
- Toileting and continence care, including proper use of assistive devices
- Feeding assistance, positioning for meals, and recognizing swallowing precautions
- Transfers, ambulation assistance, and body mechanics to prevent injury to resident and caregiver
Because ADL questions frequently overlap with Basic Nursing Skills content, mastering this domain also reinforces the largest domain on the exam - a natural pairing worth building your review plan around.
Domain 2: Basic Nursing Skills (35%)
Basic Nursing Skills is the largest single domain on the NNAAP knowledge exam by a wide margin, and it's also the domain most closely tested during the hands-on Skills Evaluation. Treat this as the backbone of your entire study plan.
Basic Nursing Skills
This domain tests core clinical tasks a nurse aide performs under supervision, including monitoring, infection control, and safety procedures.
- Measuring and recording vital signs (temperature, pulse, respiration, blood pressure)
- Height and weight measurement techniques
- Infection control practices, including hand hygiene and standard precautions
- Recognizing and reporting changes in a resident's condition
- Safety and emergency procedures, including fall prevention and fire safety basics
Notice the direct connection to the Skills Evaluation: hand hygiene and one measurement skill are guaranteed to appear among the five randomly selected skills you'll demonstrate live before a Nurse Aide Evaluator, and all five must be rated satisfactory to pass. Studying Basic Nursing Skills thoroughly pays off twice - once on the written exam and again on the practical portion. Our CNA Study Guide breaks down exactly how to structure review sessions around this dual-weighted domain.
Key Takeaway
Because Basic Nursing Skills appears on both the written exam and the Skills Evaluation, any time spent mastering vital signs, infection control, and hand hygiene delivers a return on two separate parts of the certification process.
Domain 3: Self-Care and Independence (7%)
This domain focuses on the philosophy behind nurse aide care: helping residents do as much for themselves as safely possible rather than doing everything for them.
Self-Care and Independence
Questions test your understanding of promoting resident autonomy and adapting care to individual ability levels.
- Encouraging residents to complete tasks within their capability
- Adapting care plans as a resident's abilities change over time
- Recognizing the difference between assisting and taking over a task unnecessarily
Domain 4: Emotional and Mental Health Needs (8%)
Expect questions about recognizing emotional distress, supporting residents through cognitive changes, and responding appropriately to behavioral symptoms.
Emotional and Mental Health Needs
This domain assesses your ability to identify and respond to psychological and behavioral needs of residents.
- Recognizing signs of depression, anxiety, or confusion
- Appropriate responses to residents with dementia or cognitive decline
- Supporting residents adjusting to loss of independence or a new care setting
Domain 5: Spiritual and Cultural Needs (2%)
This is the smallest domain on the exam, but it still requires familiarity with respecting diverse beliefs and practices in care settings.
Spiritual and Cultural Needs
Candidates must show sensitivity toward religious, spiritual, and cultural differences among residents.
- Accommodating dietary or ritual practices tied to belief systems
- Respecting privacy around spiritual practices
- Avoiding assumptions based on a resident's background
Because this domain carries only 2% weight, spend just enough time to recognize the core principles - don't let it crowd out review time better spent on Basic Nursing Skills or Activities of Daily Living.
Domain 6: Communication (7%)
Communication questions test how you interact with residents, families, and the care team - not just what you say, but how you document and report it.
Communication
This domain covers verbal, nonverbal, and written communication skills essential to safe resident care.
- Using clear, respectful language with residents who have hearing, vision, or cognitive limitations
- Accurate observation, reporting, and documentation practices
- Nonverbal communication cues and their importance in resident interactions
Domain 7: Client Rights (8%)
Client Rights questions test your understanding of the legal and ethical protections every resident is entitled to, regardless of care setting.
Client Rights
Candidates must understand the fundamental rights residents retain while receiving care.
- Right to privacy, dignity, and informed choice
- Right to be free from abuse, neglect, and unnecessary restraint
- Right to voice grievances without retaliation
Domain 8: Legal and Ethical Behavior (5%)
This domain overlaps closely with Client Rights but focuses more on the nurse aide's own conduct and legal obligations.
Legal and Ethical Behavior
Questions assess your knowledge of professional boundaries and legal responsibilities as a nurse aide.
- Mandatory reporting obligations for suspected abuse or neglect
- Confidentiality requirements around resident information
- Recognizing scope-of-practice boundaries and when to escalate to licensed staff
Domain 9: Member of the Health Care Team (6%)
The final domain tests your understanding of where a nurse aide fits within the broader care team and how to function professionally within it.
Member of the Health Care Team
This domain covers teamwork, delegation, and professional accountability within a care setting.
- Understanding the chain of communication and reporting structure
- Working cooperatively with nurses, therapists, and other care staff
- Accepting delegated tasks appropriately and knowing when to ask for guidance
Domain Weighting at a Glance
Seeing all nine domains side by side makes it obvious where your study hours should go. This table mirrors the official blueprint used to build the NNAAP knowledge exam.
| Domain | Weight | Study Priority |
|---|---|---|
| Basic Nursing Skills | 35% | Highest |
| Activities of Daily Living | 22% | High |
| Emotional and Mental Health Needs | 8% | Moderate |
| Client Rights | 8% | Moderate |
| Self-Care and Independence | 7% | Moderate |
| Communication | 7% | Moderate |
| Member of the Health Care Team | 6% | Light |
| Legal and Ethical Behavior | 5% | Light |
| Spiritual and Cultural Needs | 2% | Light |
If you're still weighing how demanding this exam is compared to what you expected, our CNA exam difficulty guide puts these weightings into context, and the CNA Pass Rate breakdown explains what the data shows about candidate outcomes.
Mapping the Domains to a Study Schedule
Rather than studying domains in the order they're listed, build your schedule around weight. Front-load the heaviest domains while your review time is freshest, then use the final days for the lighter, lower-weight topics and full practice runs.
Basic Nursing Skills
- Practice vital sign measurement and recording until it's automatic
- Review infection control steps and hand hygiene technique in detail, since it's also tested on the Skills Evaluation
Activities of Daily Living
- Work through bathing, feeding, and transfer scenarios
- Pair ADL review with body mechanics and safe transfer technique
Client Rights, Emotional/Mental Health, Communication, Self-Care
- Group these mid-weight domains together since they often test similar reasoning skills
- Focus on scenario questions about resident autonomy and reporting
Legal/Ethical, Health Care Team, Spiritual/Cultural, Full Review
- Cover the remaining light-weight domains
- Take full-length practice exams and revisit weak areas identified from missed questions
For a condensed, printable version of these priorities the night before your exam, check the CNA Cheat Sheet. And if you want to simulate the actual two-hour, 70-item format under timed conditions, you can run full-length practice exams on our practice test platform to see exactly how domain-weighted questions feel in real testing conditions.
Frequently Asked Questions
Start with Basic Nursing Skills since it carries the most weight at 35% and overlaps directly with the hands-on Skills Evaluation, including hand hygiene and measurement tasks.
There are nine content domains, ranging from Basic Nursing Skills at 35% down to Spiritual and Cultural Needs at just 2%.
Yes. Both the 70-item written exam and the oral version, which includes word-recognition items, draw questions from the same nine domains and blueprint weighting.
Not exactly. The Skills Evaluation tests five randomly selected hands-on skills within 30 minutes rather than domain percentages, but it always includes hand hygiene and one measurement skill, both rooted in the Basic Nursing Skills domain.
See our CNA Requirements guide for eligibility details and our CNA Exam Dates guide for scheduling and testing windows.