When a Field in a Database Contains a Null Value

question 14

Multiple Choice

When a field in a database contains a null value, it means that ____.

• A) the field holds zeros
• B) the field holds spaces
• C) no data has been entered in the field
• D) the field holds asterisks

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Definitions:

Beta-Amyloid

A protein fragment snipped from an amyloid precursor protein that, in excessive amounts, can form plaques in the brain and is a hallmark of Alzheimer's disease.

Protein Tau

A protein associated with the stabilization of microtubules in nerve cells, whose abnormal accumulation is linked to neurodegenerative diseases like Alzheimer's.

Plaques

Deposits of fatty substances, cholesterol, cellular waste products, calcium, and fibrin in the inner lining of an artery.

Cognitive Reserves

The mind's resilience to withstand neurological damage due to aging or other factors, often linked to an individual's level of mental engagement and education.