Oracle Database Quiz Section 5 Quiz Answer

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1.    Relationships can be Redundant. True or False?
True (*)
False

2.    If two entities have two relationships between them, these relationships can be either _____________ or _____________
Redundant and Replicated
Resourced and Really Good
Redundant or Required (*)
Replicated or Required

3.    What uncommon relationship is described by the statements: "Each DNA SAMPLE may be taken from one and only one PERSON and each PERSON may provide one and only one DNA SAMPLE"
One to One Optional (*)
Many to Many Mandatory
One to Many Mandatory
One to Many Optional

4.    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"
One to Many (*)
Many to Many
Many to More
One to One

5.    If the same relationship is represented twice in an Entity Relationship Model, it is said to be:
Replicated
Redundant (*)
Removable
Resourceful

6.    A non-transferable relationship is represented by which of the following symbols?
Diamond (*)
Heart
Triangle
Circle

7.    If a relationship can NOT be moved between instances of the entities it connects, it is said to be:
Mandatory
Non-Transferable (*)
Optional
Transferable

8.    Every ERD must have at least one non-transferable relationship. True or False?
True
False (*)

9.    Non-transferable relationships can only be mandatory, not optional. True or False?
True
False (*)

10. Which of the following is an example of a non-transferable relationship
PERSON to BIRTH PLACE (*)
EMPLOYEE to DEPARTMENT
TEACHER to SCHOOL
STUDENT to COURSE

11. When you resolve a M:M by creating an intersection entity, this new entity will always inherit:
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.
A relationship to each entity from the original M:M. (*)

12. What do you call the entity created when you resolve a M:M relationship?
M:M entity
Intersection entity (*)
Inclusion entity
Recursive entity

13. Intersection Entities often have the relationships participating in the UID, so the relationships are often barred. True or False?
True (*)
False

14. When you resolve a M:M, you simply re-draw the relationships between the two original entities; no new entities are created. True or False?
True
False (*)

15. A relationship on an ERD can have attributes. True or False?
True
False (*)

1.    If a relationship can NOT be moved between instances of the entities it connects, it is said to be:
Non-Transferable (*)
Optional
Transferable
Mandatory

2.    Every ERD must have at least one non-transferable relationship. True or False?
True
False (*)

3.    If a relationship can be moved between instances of the entities it connects, it is said to be:
Recursive
Committed
Implicit
Transferable (*)

4.    Non-transferable relationships can only be mandatory, not optional. True or False?
True
False (*)

5.    A non-transferable relationship means the relationship is manatory at both sides. True or False?
True
False (*)

6.    If two entities have two relationships between them, these relationships can be either _____________ or _____________
Replicated or Required
Redundant or Required (*)
Redundant and Replicated
Resourced and Really Good

7.    If the same relationship is represented twice in an Entity Relationship Model, it is said to be?
Removable
Replicated
Resourceful
Redundant (*)

8.    Which of the following pairs of entities is most likely to be modeled as a 1:1 relationship?
TEACHER and SUBJECT AREA
TREE and BRANCH
PERSON and FINGERPRINT (*)
CAR and WHEEL

9.    Which of the following pairs of entities is most likely to be modeled as a M:M relationship?
TREE and BRANCH
TEACHER and SUBJECT AREA (*)
CAR and WHEEL
PERSON and FINGERPRINT

10. One to many relationships are the most uncommon type of relationships in an ERD.
True
False (*)

11. When you resolve a M:M by creating an intersection entity, this new entity will always inherit:
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.
A relationship to each entity from the original M:M. (*)

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?
True (*)
False

13. Many to many relationships between entities usually hide what?
More attributes
Uniqueness
Another relationship
Another entity (*)

14. If an intersection entity is formed that contains no attributes of its own, its uniqueness may be modeled by
Creating new attributes.
Barring the relationships to the original entities. (*)
Placing the UID attributes from the original entities into the intersection entity.
None of the above.

15. Intersection Entities often have the relationships participating in the UID, so the relationships are often barred. True or False?
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?
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"
Many to Many
Many to More
One to One
One to Many (*)

3.    If the same relationship is represented twice in an Entity Relationship Model, it is said to be:
Redundant (*)
Resourceful
Removable
Replicated

4.    One to many relationships are the most uncommon type of relationships in an ERD. True or False?
True
False (*)

5.    Which of the following pairs of entities is most likely to be modeled as a M:M relationship?
CAR and WHEEL
TREE and BRANCH
PERSON and FINGERPRINT
TEACHER and SUBJECT AREA (*)

6.    A Diamond on a relationship indicates the Relationship as Non-Tranferable. True or False?
True (*)
False

7.    Every ERD must have at least one non-transferable relationship. True or False?
True
False (*)

8.    If a relationship can NOT be moved between instances of the entities it connects, it is said to be:
Optional
Mandatory
Non-Transferable (*)
Transferable

9.    The relationship between CUSTOMER and RECEIPT is an example of a non-transferable relationship. True or False?
True (*)
False

10. If a relationship can be moved between instances of the entities it connects, it is said to be:
Recursive
Implicit
Transferable (*)
Committed

11. If an intersection entity is formed that contains no attributes of its own, its uniqueness may be modeled by
Creating new attributes.
Barring the relationships to the original entities. (*)
Placing the UID attributes from the original entities into the intersection entity.
None of the above.

12. When you resolve a M:M, you simply re-draw the relationships between the two original entities; no new entities are created. True or False?
True
False (*)

13. Many to many relationships between entities usually hide what?
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?
True (*)
False

15. Intersection Entities often have the relationships participating in the UID, so the relationships are often barred. True or False?
True (*)
False

1.    When you resolve a M:M by creating an intersection entity, this new entity will always inherit:
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?
M:M entity
Inclusion entity
Intersection entity (*)
Recursive entity

3.    Many to many relationships between entities usually hide what?
Uniqueness
Another relationship
Another entity (*)
More attributes

4.    A relationship on an ERD can have attributes. True or False?
True
False (*)

5.    If an intersection entity is formed that contains no attributes of its own, its uniqueness may be modeled by
Creating new attributes.
Barring the relationships to the original entities. (*)
Placing the UID attributes from the original entities into the intersection entity.
None of the above.

6.    A Diamond on a relationship indicates the Relationship as Non-Tranferable. True or False?
True (*)
False

7.    Non-transferable relationships can only be mandatory, not optional. True or False?
True
False (*)

8.    The relationship between CUSTOMER and RECEIPT is an example of a non-transferable relationship. True or False?
True (*)
False

9.    If a relationship can NOT be moved between instances of the entities it connects, it is said to be:
Non-Transferable (*)
Optional
Transferable
Mandatory

10. A non-transferable relationship means the relationship is manatory at both sides. True or False?
True
False (*)

11. Which of the following pairs of entities is most likely to be modeled as a 1:1 relationship?
PERSON and FINGERPRINT (*)
CAR and WHEEL
TEACHER and SUBJECT AREA
TREE and BRANCH

12. What uncommon relationship is described by the statements: "Each DNA SAMPLE may be taken from one and only one PERSON and each PERSON may provide one and only one DNA SAMPLE"
One to One Optional (*)
One to Many Mandatory
Many to Many Mandatory
One to Many Optional

13. Which of the following pairs of entities is most likely to be modeled as a M:M relationship?
TREE and BRANCH
PERSON and FINGERPRINT
CAR and WHEEL
TEACHER and SUBJECT AREA (*)

14. 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"
One to Many (*)
One to One
Many to More
Many to Many

15. Many to many relationships must be left in the Model. It is important to have them documented as M-M. True or False?
True
False (*)

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