I have five E-R model questions:

Question 24

1. When converting an E-R model to a relational model, the table for a binary relationship can be replaced by a foreign key provided the relationship is not

	A.	many-to-many
	B.	many-to-one
	C.	one-to-many
	D.	one-to-one

0.5 points

Question 31

1. In the E-R model, an attribute that can be broken down into smaller attributes is called

	A.	composite
	B.	null
	C.	a superattribute
	D.	derived

0.5 points

Question 34

1. In the EE-R model, completeness constraints tell us whether a specialization is

	A.	total or partial
	B.	union or category
	C.	disjoint or overlapping
	D.	predicate-defined or user-defined

0.5 points

Question 38

1. When an entity set is related to itself, we have a _______ relationship.

	A.	extended
	B.	optional
	C.	mandatory
	D.	recursive

0.5 points

Question 39

1. In the relational model, the table in which a foreign key appears as the primary key is called its

	A.	root relation
	B.	home relation
	C.	child relation
	D.	foreign relation