### True Or False

Question 1 :

In a relation, the order of the rows matters.

A). True
B). False

Question 2 :

In a relation, the rows are sometimes called "records."

A). True
B). False

Question 3 :

A relation is a two-dimensional table.

A). True
B). False

Question 4 :

Any table that meets the definition of a relation is said to be in first normal form.

A). True
B). False

Question 5 :

Given the functional dependency R ? (S,T) , then it is also true that R ? S.

A). True
B). False

Question 6 :

A candidate key is a determinant that determines all the other columns is a relation.

A). True
B). False

Question 7 :

The only reason for the existence of relations is to store instances of functional dependencies.

A). True
B). False

Question 8 :

A relation is in 5NF when multivalued dependencies are isolated in their own relation.

A). True
B). False

Question 9 :

The functional dependency R ? S means that the value of S can be determined when we are given a value of R.

A). True
B). False

Question 10 :

In a relation, the columns are sometimes called "attributes."

A). True
B). False

Question 11 :

In a relation, the order of the columns does not matter.

A). True
B). False

Question 12 :

A functional dependency is a relationship between or among attributes.

A). True
B). False

Question 13 :

A key is a group of one or more attributes that uniquely identifies a row.

A). True
B). False

Question 14 :

Keys made up of two or more attributes are called composite keys.

A). True
B). False

Question 15 :

Given the functional dependency R ? S , R is called the determinant.

A). True
B). False

Question 16 :

Relations are categorized into normal forms according to the referential integrity constraints that they have.

A). True
B). False

Question 17 :

A relation is in Boyce-Codd Normal Form (BCNF) if every determinant is a composite key.

A). True
B). False

Question 18 :

A functional dependency is always an equation.

A). True
B). False

Question 19 :

A relation has cells that hold multi-value entries.

A). True
B). False

Question 20 :

In a relation, the rows are sometimes called "fields."

A). True
B). False