The primary key for 1:1 relationship tables
A)is a single attribute.
B)always consists of two attributes.
C)is the primary key of the most important entity linked to that relationship.
D)does not exist.Many-to-many relationship tables only use foreign keys.

Question

Quizplus · Accepted Answer

In a 1:1 relationship, each record in the first table is associated with one and only one record in the second table, and vice versa. Since there is a one-to-one mapping between the two tables, the primary key for each table is a single attribute that uniquely identifies a record in that table. This primary key is then used as a foreign key in the other table to establish the relationship.

The Primary Key for 1:1 Relationship Tables