Intersection Entities often have the relationships participating in the UID, so the relationships
are often barred. True or False? Mark for Review (1) Points True (*) False
15.
A relationship on an ERD can have attributes. True or False? Mark for Review
(1) Points True False (*)
2.
Every ERD must have at least one non-transferable relationship. True or False?
Mark for
Review (1) Points True False (*)
3.
If a relationship can be moved between instances of the entities it connects, it is said to be:
Mark for Review (1) Points Recursive Committed
Implicit Transferable (*)
4.
Non-transferable relationships can only be mandatory, not optional. True or False? Mark for
Review (1) Points True False (*)
8.
Which of the following pairs of entities is most likely to be modeled as a 1:1 relationship?
Mark for Review (1) Points TEACHER and SUBJECT AREA TREE and BRANCH PERSON and FINGERPRINT (*) CAR and WHEEL
10.
One to many relationships are the most uncommon type of relationships in an ERD. True or
False? Mark for Review (1) Points True False (*)
12.
A barred relationship on an ERD signifies that the UID of the intersection entity is inherited
from the entities that made up the original many to many relationship. True or False? Mark for Review (1) Points True (*) False
13.
Many to many relationships between entities usually hide what?
Mark for Review
(1) Points More attributes Uniqueness Another relationship Another entity (*)
15.
Intersection Entities often have the relationships participating in the UID, so the relationships
are often barred. True or False? Mark for Review (1) Points True (*) False
1.
Many to many relationships must be left in the Model. It is important to have them
documented as M-M. True or False? Mark for Review (1) Points True False (*)
2.
What relationship is described by the statements: "Each CUSTOMER may place one or more
ORDERs, each ORDER must be placed by one and only one CUSTOMER" (1) Points Many to Many Many to More One to One One to Many (*)
Mark for Review
4.
One to many relationships are the most uncommon type of relationships in an ERD. True or
False? Mark for Review (1) Points True False (*)
6.
A Diamond on a relationship indicates the Relationship as Non-Tranferable. True or False?
Mark for Review (1) Points True (*) False
7.
Every ERD must have at least one non-transferable relationship. True or False?
Mark for
Review (1) Points True False (*)
9.
The relationship between CUSTOMER and RECEIPT is an example of a non-transferable
relationship. True or False? Mark for Review (1) Points True (*) False
10.
If a relationship can be moved between instances of the entities it connects, it is said to be:
Mark for Review (1) Points Recursive Implicit
Transferable (*) Committed
.
13.
Many to many relationships between entities usually hide what?
Mark for Review
(1) Points More attributes Another relationship Uniqueness Another entity (*)
14.
A barred relationship on an ERD signifies that the UID of the intersection entity is inherited
from the entities that made up the original many to many relationship. True or False? Mark for Review (1) Points True (*) False
15.
Intersection Entities often have the relationships participating in the UID, so the relationships
are often barred. True or False? Mark for Review (1) Points True (*) False
1.
When you resolve a M:M by creating an intersection entity, this new entity will always inherit:
Mark for Review (1) Points A relationship to each entity from the original M:M. (*)
The attributes of both related entities. The UID's from the entities in the original M:M. Nothing is inherited from the original entities and relationship.
2.
What do you call the entity created when you resolve a M:M relationship?