Relational databases uses:
A: A hierarchy model.
B: An object model..
C: Star schema model.
D: Tables with rows and columns.
CBK 8: Software Development Security
Source: ThorTeaches.com practice tests
D: Relational model: Organizes data into one or more tables (or relations) of columns and rows, with a unique key identifying each row. Rows are also called records or tuples. Generally, each table/relation represents one entity type. The rows represent instances of that type of entity and the columns representing values attributed to that instance.