I can't remember what the basic one is called but the extensive testing takes hours. You need a Neurologist for accurate testing. They can also determine what type of Dementia they have. This is important because of meds given.
The SAGE test is a 12-question exam that measures cognitive functioning and may help a physician determine whether Alzheimer's is present. It's recommended that you bring your completed test to a medical professional who can score and interpret the results. If necessary, your doctors will provide further screening.
Below is a link to find the SAGE test:
https://www.betterhelp.com/advice/alzheimers/is-there-an-at-home-alzheimer-test-12-questions-for-possible-patients/