When representing a 1:1 relationship in a relational database ...

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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

[gasdhashg]

Answer to Question 1

B

Answer to Question 2

C

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TYSM

[dawsa925]

Gracias!