Which data type CANNOT be used as an Attribute field?

• A. Integer
• B. String
• C. Table
• D. Boolean

Answer: (C)

Attribute fields store a single, simple value rather than a collection. They are meant for primitive data types that hold one value, such as numbers, text, or true/false. A Table, however, implies multiple rows and columns—a structured collection of data—not something that can be stored in one attribute field. To model tabular data, you’d use a separate table or related entity rather than an Attribute field. The other options fit because Integer, String, and Boolean are all single-value, atomic types suitable for an attribute.