Answer Oracle Design Quiz Section 3

Section 3 Quiz

                (Answer all questions in this section)
1.            What are the three properties that every relationship should have?        Mark for Review
(1) Points
                Name, optionality, cardinality (*)
                A UID bar, a diamond, an arc
                Name, optionality, arcs
                Transferability, degree, name

2.            Relationships can be either mandatory or optional. True or False?            Mark for Review
(1) Points
                True (*)
                False

3.            In a business that sells pet food, choose the best relationship name between FOOD TYPE and ANIMAL (e.g. dog, horse, or cat). (Choose Two)            Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Each ANIMAL must be the seller of one or more FOOD TYPES.
                Each FOOD TYPE may be manufactured by one or more ANIMALs.
                Each FOOD TYPE must be suitable for one or more ANIMALs. (*)
                Each FOOD TYPE may be given to one or more ANIMALs. (*)

4.            One Relationship can be mandatory in one direction and optional in the other direction. True or False?  Mark for Review
(1) Points
                True (*)
                False

5.            Which of the following are used to show Cardinality on an ERD? (Choose two)    Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Crow's foot. (*)
                Solid line.
                Single toe. (*)
                Dashed line.

6.            Which of the following are true about Cardinality? (Choose two)               Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Cardinality tells "how many". (*)
                Cardinality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.
                Cardinality specifies whether something is required or not.
                Cardinality specifies only singularity or plurality, but not a specific plural number. (*)

7. Which symbol is used to show that a particular attribute is mandatory?             Mark for Review
(1) Points
                &
                #
                o
                * (*)

8.            Entity boxes are drawn as            Mark for Review
(1) Points
                Soft Boxes (*)
                Hard Boxes
                Normal Circles
                Bold Circles

9.            ERDish describes a relationship in words. True or False? Mark for Review
(1) Points
                True (*)
                False

10.          Which of the following are used to show a relationship on an ERD? (Choose Three)          Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Dashed line. (*)
                Crow's foot. (*)
                Solid line. (*)
                # symbol.

11. When reading a relationship between 2 entities, the relationship is read both from left to right and right to left. True or False?    Mark for Review
(1) Points
                True (*)
                False

12. Relationship names are not shown on an ERD. True or False?               Mark for Review
(1) Points
                True
                False (*)

13. Matrix Diagrams show Optionality and Cardinality of the ERDs they document. True or False?              Mark for Review
(1) Points
                True
                False (*)

14.          Matrix Diagrams are developed BEFORE the ERD. True or False?                Mark for Review
(1) Points
                True (*)
                False

15.          Matrix Diagrams are used to verify that all relationships have been identified for an ERD. True or False? Mark for Review
(1) Points
                True (*)
                False
1.            Which of the following are used to show a relationship on an ERD? (Choose Three)          Mark for Review
(1) Points
                                                (Choose all correct answers)    
                # symbol.
                Solid line. (*)
                Dashed line. (*)
                Crow's foot. (*)

2.            Relationship names are not shown on an ERD. True or False?      Mark for Review
(1) Points
                True
                False (*)

3.            When reading the relationships in an ERD, you are said to be speaking:  Mark for Review
(1) Points
                Entity-ish
                Gibberish
                ERDish (*)
                Relationship-ish

4.            ERDish describes a relationship in words. True or False? Mark for Review
(1) Points
                True (*)
                False

5.            What are the three properties that every relationship should have?        Mark for Review
(1) Points
                Name, optionality, arcs
                Transferability, degree, name
                Name, optionality, cardinality (*)
                A UID bar, a diamond, an arc

6.            Relationships can be either mandatory or optional. True or False?            Mark for Review
(1) Points
                True (*)
                False

7.            Which of the following are used to show Cardinality on an ERD? (Choose two)    Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Single toe. (*)
                Dashed line.
                Crow's foot. (*)
                Solid line.

8.            Relationships always exist between        Mark for Review
(1) Points
                3 or more attributes
                3 or more entities
                2 entities (or one entity and itself) (*)
                2 attributes

9.            In a business that sells pet food, choose the best relationship name between FOOD TYPE and ANIMAL (e.g. dog, horse, or cat). (Choose Two)            Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Each ANIMAL must be the seller of one or more FOOD TYPES.
                Each FOOD TYPE may be given to one or more ANIMALs. (*)
                Each FOOD TYPE may be manufactured by one or more ANIMALs.
                Each FOOD TYPE must be suitable for one or more ANIMALs. (*)

10.          Which of the following are true about Cardinality? (Choose two)               Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Cardinality specifies whether something is required or not.
                Cardinality specifies only singularity or plurality, but not a specific plural number. (*)
                Cardinality tells "how many". (*)
                Cardinality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.

11.          To identify an attribute as part of a unique identifier on an ER diagram, the # symbol goes in front of it. True or False?              Mark for Review
(1) Points
                True (*)
                False

12.          Entity names are always singular. True or False?                Mark for Review
(1) Points
                True (*)
                False

13.          Matrix Diagrams show Optionality and Cardinality of the ERDs they document. True or False?     Mark for Review
(1) Points
                True
                False (*)

14.          Matrix Diagrams are developed BEFORE the ERD. True or False?                Mark for Review
(1) Points
                True (*)
                False

15.          Matrix Diagrams are used to verify that all relationships have been identified for an ERD. True or False? Mark for Review
(1) Points
                True (*)
                False

1.            Entity names are always singular. True or False?                Mark for Review
(1) Points
                True (*)
                False

2.            Entity boxes are drawn as            Mark for Review
(1) Points
                Normal Circles
                Hard Boxes
                Soft Boxes (*)
                Bold Circles

3.            Relationship names are not shown on an ERD. True or False?      Mark for Review
(1) Points
                True
                False (*)

4.            ERDish describes a relationship in words. True or False? Mark for Review
(1) Points
                True (*)
                False

5.            Which of the following are used to show a relationship on an ERD? (Choose Three)          Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Crow's foot. (*)
                Solid line. (*)
                # symbol.
                Dashed line. (*)

6.            When reading a relationship between 2 entities, the relationship is read both from left to right and right to left. True or False?          Mark for Review
(1) Points
                True (*)
                False

7.            Which of the following are true about Cardinality? (Choose two)               Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Cardinality specifies whether something is required or not.
                Cardinality tells "how many". (*)
                Cardinality specifies only singularity or plurality, but not a specific plural number. (*)
                Cardinality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.

8.            Which of the following are true about Relationship Optionality? (Choose two)    Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Optionality specifies only singularity or plurality, but not a specific plural number.
                Optionality answers "may or must". (*)
                Optionality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.
                Optionality specifies whether something is required or not. (*)

9.            In a business that sells pet food, choose the best relationship name between FOOD TYPE and ANIMAL (e.g. dog, horse, or cat). (Choose Two)            Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Each FOOD TYPE may be given to one or more ANIMALs. (*)
                Each FOOD TYPE may be manufactured by one or more ANIMALs.
                Each FOOD TYPE must be suitable for one or more ANIMALs. (*)
                Each ANIMAL must be the seller of one or more FOOD TYPES.

10. What are the three properties that every relationship should have? Mark for Review
(1) Points
                Transferability, degree, name
                Name, optionality, arcs
                Name, optionality, cardinality (*)
                A UID bar, a diamond, an arc

11.          Relationship Cardinality is important. True or False?         Mark for Review
(1) Points
                True (*)
                False

12.          Relationships can be either mandatory or optional. True or False?            Mark for Review
(1) Points
                True (*)
                False

13.          Matrix Diagrams are used to verify that all relationships have been identified for an ERD. True or False? Mark for Review
(1) Points
                True (*)
                False

14.          Matrix Diagrams are developed BEFORE the ERD. True or False?                Mark for Review
(1) Points
                True (*)
                False

15.          Matrix Diagrams show Optionality and Cardinality of the ERDs they document. True or False?     Mark for Review
(1) Points
                True
                False (*)

1.            Entity boxes are drawn as            Mark for Review
(1) Points
                Normal Circles
                Hard Boxes
                Bold Circles
                Soft Boxes (*)

2.            Entity names are always singular. True or False?                Mark for Review
(1) Points
                True (*)
                False

3.            Matrix Diagrams are developed BEFORE the ERD. True or False?                Mark for Review
(1) Points
                True (*)
                False

4.            Matrix Diagrams show Optionality and Cardinality of the ERDs they document. True or False?     Mark for Review
(1) Points
                True
                False (*)

5.            Matrix Diagrams are used to verify that all relationships have been identified for an ERD. True or False? Mark for Review
(1) Points
                True (*)
                False

6.            Which of the following are used to show a relationship on an ERD? (Choose Three)          Mark for Review
(1) Points
                                                (Choose all correct answers)    
                # symbol.
                Dashed line. (*)
                Crow's foot. (*)
                Solid line. (*)

7.            When reading the relationships in an ERD, you are said to be speaking:  Mark for Review
(1) Points
                Entity-ish
                Relationship-ish
                Gibberish
                ERDish (*)

8.            Relationship names are not shown on an ERD. True or False?      Mark for Review
(1) Points
                True
                False (*)

9.            ERDish describes a relationship in words. True or False? Mark for Review
(1) Points
                True (*)
                False

10.          Which of the following are true about Relationship Optionality? (Choose two)    Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Optionality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.
                Optionality answers "may or must". (*)
                Optionality specifies only singularity or plurality, but not a specific plural number.
                Optionality specifies whether something is required or not. (*)

11.          One Relationship can be mandatory in one direction and optional in the other direction. True or False?  Mark for Review
(1) Points
                True (*)
                False

12.          Relationships always exist between        Mark for Review
(1) Points
                3 or more attributes
                3 or more entities
                2 entities (or one entity and itself) (*)
                2 attributes

13.          Which of the following are true about Cardinality? (Choose two)               Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Cardinality specifies whether something is required or not.
                Cardinality specifies a counting number (like 1, 2, 3, 4 etc.) in a relationship.
                Cardinality tells "how many". (*)
                Cardinality specifies only singularity or plurality, but not a specific plural number. (*)

14. Which of the following are used to show Cardinality on an ERD? (Choose two)             Mark for Review
(1) Points
                                                (Choose all correct answers)    
                Single toe. (*)
                Crow's foot. (*)
                Dashed line.
                Solid line.

15.          What are the three properties that every relationship should have?        Mark for Review
(1) Points
                A UID bar, a diamond, an arc
                Transferability, degree, name
                Name, optionality, cardinality (*)
                Name, optionality, arcs

1. What are the three properties that every relationship should have?

Transferability, degree, name
Name, optionality, degree
A UID bar, a diamond, an arc
Name, optionality, arcs

2. Relationships can be either mandatory or optional. True or False?

True
False

3. In a business that sells computers, choose the best relationship name from CUSTOMER to ITEM (computer, in this case).

Each CUSTOMER must be the buyer of one or more ITEMS.
Each CUSTOMER must be the seller of one or more ITEMS.
Each CUSTOMER may be the maker of one or more ITEMS.
Each CUSTOMER may be the producer of one or more ITEMS.

4. Relationships always exist between

3 or more entities
2 entities (or one entity twice) 
2 attributes
3 or more attributes

Test: Quiz: ER Diagramming

1. Attributes are written inside the entity to which they belong. True or False?

True
False

2. Entity boxes are drawn as

Soft Boxes
Hard Boxes
Bold Circles
Normal Circles

3. Entity names are always plural. True or False?

True
False

4. Which symbol is used to indicate that a particular attribute is optional?

*
o –
#
&

5. On an ER diagram which symbol identifies an attribute as part of a unique identifier.

# –
*
o
x

6. Consider the recommended drawing conventions for ERD’s. Indicate which of the following accurately describes diagramming conventions for entities and attributes:

The * means that an attribute is optional and entity names should be plural verbs
The ‘o’ means that the attribute is optional and entity names should be plural verbs
The * means that an attribute is mandatory or required and the entity name should be singular
The ‘o’ means that the attribute is mandatory or required and the entity name should be a singular noun

Test: Quiz: Speaking ERDish and Drawing Relationships

1. Two entities can have one or more relationships between them. True or False?

True
False

2. After looking at the diagram, choose the sentence below that could be “read” from the existing relationship (even though you’re missing relationship labels!)

Each Student must have one or more Activities.
Each Activity may be performed by one or more Students.
Each Student may participate in one or more Activities.
Each Activity must belong to one and only one Student.

3. When reading a relationship between 2 entities, the relationship is only read from left to right. True or False?

True
False

Test: Quiz: Matrix Diagrams

1. A Matrix Diagram will help you with all of the following except:

Defining Relationships Between Entities
Identifying Entities
Defining Instances of Entities
Naming Relationships

2. Matrix Diagrams helps verify you have identified all possible relationships between your existing entities. True or False?

True
False

3. Creating a Matrix Diagram is mandatory when doing Data Modeling. True or False?

True
False