Which of the following most closely represents the concept of cardinality?

A. Whether or not the value in one table is a primary key in the other.

B. The minimum number of times a key from one table can exist in another.

C. The maximum number of times a key from one table can exist in another.

D. Whether or not a key from one table is optional to include in another.

Which definition below most closely represents a class?

A. A template for storing data about a similar set of things

B. A representation of a record in an ER diagram

C. A method for evaluating which records of an ER diagram support a key definition

D. A representation of a column in an ER diagram

Which of the following most closely resembles the meaning of optionality?

A. The option the data architect has when determining which column will become the key.

B. Whether a key may or may not have representation in the table it has a relationship with, meaning a 0 in the ordinality position.

C. Whether or not it is optional for a primary key to exist on a table.

D. The option to choose which column should be the primary key

Which of the following most closely matches the meaning or ordinality?

A. What the order of the keys in the table should be

B. The maximum number of times a key from one table can appear in another.

C. The minimum number of time a key from one table can appear in another.

D. Whether or not the key is optional in the another table.