The attribute AGE is calculated from DATE_OF_BIRTH. The attribute AGE isa.Derivedb.Multi valuedc.Composited.Single valued

To determine the attribute category for AGE derived from DATE_OF_BIRTH, let's analyze the options provided:

1. Derived: AGE is indeed derived from another attribute (DATE_OF_BIRTH). It is not a value that exists independently but calculated from the given date.

2. Multi-valued: AGE is not multi-valued because it is a single numerical value representing a person’s age at any given time.

3. Composite: AGE is not a composite attribute either as it does not consist of multiple components; it is a single entity.

4. Single-valued: AGE is a single-valued attribute, as each person can have only one current age at a time.

Based on this analysis, the best answer is:

Final Answer

AGE is a Derived and Single-valued attribute.