Author Question: When representing a 1:1 relationship in a relational database design, ________. A) the key of ... (Read 77 times)

plus1 · **on:** Jul 7, 2018

When representing a 1:1 relationship in a relational database design, ________.

A) the key of each table must be placed as foreign keys into the other
B) the key of either table may be placed as a foreign key into the other
C) the key of both tables must be the same
D) the intersection table gets the key from both relations

Question 2

Which of the following is considered to be a weak entity?

A) A subtype entity
B) The archetype in an archetype/instance pattern
C) The association entity in an association pattern
D) The parent entity in a parent-child relationship