The scoring of the Certified Nursing Assistant (CNA) test varies between the written (or oral) examination and the clinical skills test. Here's a general overview of how each part is typically scored:

Written (or Oral) Examination:
This exam usually consists of multiple-choice questions. Each question typically has one correct answer, and each correct answer usually scores an equal number of points. The total number of questions and the passing score can vary by state, but commonly the test consists of around 60 to 100 questions. The passing score is generally a fixed percentage of the total questions, often around 70% to 80%, but this can vary by state.

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Clinical Skills Test:
This part of the exam assesses your ability to perform nursing-related tasks.
You are typically required to demonstrate around 3 to 5 skills from a possible list of 20 to 30 tasks. Each skill is assessed against a checklist of critical steps that must be performed correctly to ensure patient safety and effective care.
The evaluator will mark each step of the skill as done correctly, done incorrectly, or missed. To pass, you must perform all critical steps correctly and achieve an overall minimum score for each skill. The exact scoring details can vary, but generally, there is little room for error on critical steps.

Both sections must usually be passed to receive certification. Failing either section typically means that the candidate must retake the failed portion. In some states, there is a limit on how many times the test can be retaken or a requirement to undergo additional training after multiple failures.

For precise scoring information, you should refer to the guidelines provided by the specific certifying authority or the state's health department responsible for CNA certification.