Which of the following statements regarding the table below is true? \[\begin{array} { | l | l | l |} \hline \text { ColumnA } & \text { ColumnB } & \text { ColumnC } \\ \hline \end{array}\]

A) Every value in Column A is unique B) Every value in Column B is unique C) Every combination of values in Column A and Column B within the same row is unique D) All of the above A) Every value in Column A is unique B) Every value in Column B is unique C) Every combination of values in Column A and Column B within the same row is unique D) All of the above

Exam 3: Relational Database Modeling

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is 0<,then the number of optional columns in the relational schema resulting from mapping the GENERIC ERD is 0.

(True/False)

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Question 41

How many columns will a relation resulting from mapping the Entity X have?

(Multiple Choice)

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Question 42

ZYX COMPANY Observe the ER diagram for the ZYX COMPANY: This ER diagram will be used for the following questions citing ZYX Company ER Diagram. -Attribute CustAge from the ZYX Company ER diagram will be mapped as a column of the relation CUSTOMER.

(True/False)

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Question 43

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is ||,then the number of optional columns in the relational schema resulting from mapping the GENERIC ERD is 0.

(True/False)

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Question 44

If one of two identical relational tables has the first row moved to the last place,those two relational tables are no longer identical.

(True/False)

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Question 45

EAGLERUN TRUCKING DISPATCHER Observe the ER diagram for the Eaglerun Trucking Dispatcher: This ER diagram will be used for the following questions citing Eaglerun Trucking Dispatcher ER Diagram. -How many columns will the relation TRUCK have in the relational schema mapped from the Eaglerun Trucking Dispatcher ER diagram?

(Multiple Choice)

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Question 46

For each employee middle initial is optional is an example of an implicit database constraint.

(True/False)

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Question 47

EAGLERUN TRUCKING DISPATCHER Observe the ER diagram for the Eaglerun Trucking Dispatcher: This ER diagram will be used for the following questions citing Eaglerun Trucking Dispatcher ER Diagram. -How many unique non-primary key columns will the relational schema mapped from the Eaglerun Trucking Dispatcher ER diagram have?

(Multiple Choice)

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Question 48

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is ||,then the number of columns in the relational schema resulting from mapping the GENERIC ERD is 5.

(True/False)

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Question 49

If one of two identical relational tables has the last column row moved to the first place,those two relational tables are no longer identical.

(True/False)

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Question 50

CENTRAL SCHOOL LIBRARY Observe the ER diagram for the CENTRAL SCHOOL LIBRARY -How many foreign keys will the relational schema mapped from the Central School Library ER diagram have?

(Multiple Choice)

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Question 51

Which of the following is NOT true? In a relational database:

(Multiple Choice)

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Question 52

Which of the following statements regarding the table below is true? ColumnA ColumnB ColumnC

(Multiple Choice)

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Question 53

A foreign key column must have the same name as the primary key column it refers to.

(True/False)

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Question 54

An ER diagram that contains two entities involved in two separate M:N relationships will be mapped as how many relations?

(Multiple Choice)

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Question 55

If a 1:M relationship is optional on the M side and mandatory on the 1 side,and if the table resulting from the 1 side has 3 records,then the table resulting from the M side CANNOT have less than ________ records.

(Multiple Choice)

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Question 56

EAGLERUN TRUCKING DISPATCHER Observe the ER diagram for the Eaglerun Trucking Dispatcher: This ER diagram will be used for the following questions citing Eaglerun Trucking Dispatcher ER Diagram. -How many foreign keys will the relational schema mapped from the Eaglerun Trucking Dispatcher ER diagram have?

(Multiple Choice)

4.8/5

(35)

Question 57

EAGLERUN TRUCKING DISPATCHER Observe the ER diagram for the Eaglerun Trucking Dispatcher: This ER diagram will be used for the following questions citing Eaglerun Trucking Dispatcher ER Diagram. -How many tables will the relational schema mapped from the Eaglerun Trucking Dispatcher ER diagram have?

(Multiple Choice)

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(38)

Question 58

CENTRAL SCHOOL LIBRARY Observe the ER diagram for the CENTRAL SCHOOL LIBRARY -How many tables will the relational schema mapped from the Central School Library ER diagram have?

(Multiple Choice)

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(31)

Question 59

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is 0|,then the number of relations in the relational schema resulting from mapping the GENERIC ERD is 2.

(True/False)

4.8/5

(39)

Question 60

Showing 41 - 60 of 100

How many columns will a relation resulting from mapping the Entity X have?

ZYX COMPANY Observe the ER diagram for the ZYX COMPANY: This ER diagram will be used for the following questions citing ZYX Company ER Diagram. -Attribute CustAge from the ZYX Company ER diagram will be mapped as a column of the relation CUSTOMER.

If one of two identical relational tables has the first row moved to the last place,those two relational tables are no longer identical.

For each employee middle initial is optional is an example of an implicit database constraint.

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is ||,then the number of columns in the relational schema resulting from mapping the GENERIC ERD is 5.

If one of two identical relational tables has the last column row moved to the first place,those two relational tables are no longer identical.

CENTRAL SCHOOL LIBRARY Observe the ER diagram for the CENTRAL SCHOOL LIBRARY -How many foreign keys will the relational schema mapped from the Central School Library ER diagram have?

Which of the following is NOT true? In a relational database:

Which of the following statements regarding the table below is true? ColumnA ColumnB ColumnC

A foreign key column must have the same name as the primary key column it refers to.

An ER diagram that contains two entities involved in two separate M:N relationships will be mapped as how many relations?

If a 1:M relationship is optional on the M side and mandatory on the 1 side,and if the table resulting from the 1 side has 3 records,then the table resulting from the M side CANNOT have less than ________ records.

EAGLERUN TRUCKING DISPATCHER Observe the ER diagram for the Eaglerun Trucking Dispatcher: This ER diagram will be used for the following questions citing Eaglerun Trucking Dispatcher ER Diagram. -How many tables will the relational schema mapped from the Eaglerun Trucking Dispatcher ER diagram have?

CENTRAL SCHOOL LIBRARY Observe the ER diagram for the CENTRAL SCHOOL LIBRARY -How many tables will the relational schema mapped from the Central School Library ER diagram have?

GENERIC ERD Observe the GENERIC ER Diagram below: This ER diagram will be used for the following questions citing Generic ER Diagram. -If in the GENERIC ERD the Symbol 1 is >| and the Symbol2 is 0|,then the number of relations in the relational schema resulting from mapping the GENERIC ERD is 2.

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