Exam Overview, Eligibility, and Diagnostic Assessment

What Is the State CNA Competency Examination?

Before you can legally work as a nursing assistant in any US state, you must pass a state-approved competency evaluation and be listed on your state's Nurse Aide Registry. This registry is a government-maintained list of individuals who have demonstrated the minimum safe level of knowledge and skill required to care for patients and residents. Practicing as a nursing assistant without registry certification is illegal, regardless of how much training you have completed.

The competency evaluation has two separate components that you must pass: a written (knowledge) test and a clinical skills test. Both parts are typically administered by a state-approved third-party testing vendor. Check your state's nurse aide testing candidate handbook for the vendor that applies to you, because details vary by state.

The Written (Knowledge) Test

The written test is a multiple-choice examination. Most states use between 60 and 70 questions, though the exact number depends on your state. You will be given a set time limit—commonly around 90 minutes—to complete the test. Each question has four answer choices, and only one is correct.

The questions are organized around major content domains. These domains reflect the core duties and responsibilities of a nursing assistant and typically include:

• Resident Rights – privacy, dignity, confidentiality, and the right to make informed choices
• Safety and Emergency Procedures – fall prevention, fire safety, disaster response, and proper use of call systems
• Infection Control – handwashing, standard precautions, personal protective equipment (PPE), and isolation procedures
• Basic Nursing Skills – vital signs, positioning, range-of-motion exercises, and specimen collection
• Personal Care Skills – bathing, grooming, oral care, dressing, and toileting
• Mental Health and Social Service Needs – supporting emotional well-being and recognizing behavioral changes
• Communication and Documentation – reporting observations to the nurse, using proper medical terminology, and accurate charting
• Care of Cognitively Impaired Residents – approaches for residents living with dementia or Alzheimer's disease

If you have a documented reading or language disability, you may be eligible for an oral version of the written test. Ask your program director about accommodation procedures early—do not wait until just before your test date.

The Clinical Skills Test

The clinical skills portion is a hands-on evaluation conducted by a trained evaluator. You will be asked to demonstrate a set number of skills—often four or five—selected from a larger approved skill list. One skill in many states is always handwashing, because hand hygiene is the single most important infection-control measure and a foundational patient-safety behavior.

The evaluator uses a standardized checklist to score each skill. You must perform each step correctly, in the proper sequence, and with attention to resident dignity and safety. A single critical safety error—such as leaving bed rails down on a resident who needs them, or skipping handwashing—can result in an automatic failure of that skill, even if all other steps are done correctly. Patient safety is never negotiable during the evaluation.

Eligibility Requirements

To be eligible to sit for the competency evaluation, you must generally meet all of the following requirements:

1. Complete an approved nurse aide training program. Your program must meet your state's minimum hour requirements. Your school submits verification of your completion to the testing vendor or registry.

2. Pass a criminal background check. Most states require a background check before or during the application process. Certain convictions may affect your eligibility; consult your state registry for specifics.

3. Submit a completed application to the testing vendor with any required fees. Fees vary by state and are set by the vendor or the state.

4. Meet application deadlines. There is typically a window of time after program completion during which you must apply and test. If you miss this window, you may be required to repeat part or all of your training. Know your deadline and build it into your personal registration timeline.

The Registration Process Step by Step

1. Obtain the current candidate handbook from your state's testing vendor website.

2. Confirm your program director has submitted your completion verification.

3. Complete the application form accurately—errors can delay scheduling.

4. Submit your application and any required payment.

5. Schedule your test date for both the written and clinical portions.

6. Bring required identification to the test site on test day (check the handbook for accepted forms of ID).

7. After passing both parts, confirm your name appears on your state's Nurse Aide Registry before you begin working.

Why the Diagnostic Practice Test Matters

Today you will complete a 60-question diagnostic practice test. This test is not graded for a course grade—it is a tool. The results will show you, domain by domain, where your knowledge is strong and where gaps exist. Students who identify their weak areas early and study them deliberately perform significantly better on the actual competency examination. Complete the diagnostic honestly, without notes or help, so the results truly reflect your current knowledge. Use the domain gap-analysis worksheet your instructor returns to build a focused, realistic study plan for the weeks ahead.

Safety Reminder

Everything you learn in this program connects directly to the safety of real people in your care. The exam tests this knowledge because errors made by nursing assistants can cause serious harm to vulnerable residents. Approach your exam preparation with the same seriousness you would bring to the bedside.