When selecting a foreign key placement for a 1:1 relationship,place the PK of the entity on the mandatory side in the entity on the optional side as a FK,and make the FK mandatory when .
A)one side is mandatory and the other sides is optional
B)one side participates in another relationship
C)both sides are optional
D)both sides are mandatory

Question

Quizplus · Accepted Answer

In a 1:1 relationship where one side is mandatory and the other is optional, the primary key of the mandatory side should be placed as a foreign key in the optional side to ensure referential integrity and enforce the relationship.

When Selecting a Foreign Key Placement for a 1:1 Relationship,place