11. In a relation, the order of the columns does not matter.
A. True
B. False
12. A functional dependency is a relationship between or among attributes.
A. True
B. False
13. A key is a group of one or more attributes that uniquely identifies a row.
A. True
B. False
14. Keys made up of two or more attributes are called composite keys.
A. True
B. False
15. Given the functional dependency R → S , R is called the determinant.
A. True
B. False