Question 6 :
A candidate key is a determinant that determines all the other columns is a relation.
Question 7 :
The only reason for the existence of relations is to store instances of functional dependencies.
Question 8 :
A relation is in 5NF when multivalued dependencies are isolated in their own relation.
Question 9 :
The functional dependency R ? S means that the value of S can be determined when we are given a value of R.
Question 10 :
In a relation, the columns are sometimes called "attributes."