Question 1

A Class is a separately identifiable collection of business relationships.

Accepted Answer

A Class is a blueprint or prototype from which objects are created in object-oriented programming, not a collection of business relationships.

Question 2

Business rules set criteria for branching in activity models.

Accepted Answer

Business rules do set criteria for branching in activity models. Activity models depict the flow of activities or processes in a business or system. Branching refers to the point where there is a need to make a decision and choose one of several possible paths to proceed. Business rules define the criteria for making these decisions or choosing the appropriate path.

Question 3

In Unified Modeling Language (UML) Class diagrams, Associations are represented by dashed lines.

Accepted Answer

Associations in UML Class diagrams are represented by solid lines, not dashed lines.

Question 4

When building a database from Unified Modeling Language (UML) Class diagrams, each instance of each Class becomes a row in the corresponding table.

Accepted Answer

Each instance of a class becomes a row in the corresponding table when building a database from UML Class diagrams.

Question 5

The Object Management Group maintains the standard for Unified Modeling Language (UML) Class diagrams.

Accepted Answer

The Object Management Group (OMG) is responsible for maintaining the UML standard, including UML Class diagrams.

Question 6

In Unified Modeling Language (UML) Class diagrams, a Class is represented by a rectangle.

Accepted Answer

This is a true statement. In UML Class diagrams, a Class is represented by a rectangle with the class name written within the rectangle. Attributes and methods of the class can also be shown inside the rectangle or in separate compartments.

Question 7

A generalization relationship models a grouping of things that share common characteristics.

Accepted Answer

A generalization relationship is used to model a grouping of things that share common characteristics. This relationship is depicted with an arrow pointing from the specific class to the general class. For example, a specific class of "Dog" can be generalized to the general class of "Animal."

Question 8

A database should have exactly the same number of tables as there are Classes in the Unified Modeling Language (UML) Class diagram from which the database is developed.

Accepted Answer

A database can have additional tables and relationships beyond what is depicted in the UML Class diagram. The UML Class diagram is just a visual representation of the entities and relationships in the system being modeled, but it does not necessarily dictate the exact structure of the database.

Question 9

In Unified Modeling Language (UML) attributes are characteristics of individual instances of a Class.

Accepted Answer

Attributes are properties or characteristics of instances of a Class in UML.

Question 10

In Unified Modeling Language (UML) primary keys may be blank.

Accepted Answer

Primary keys cannot be blank in UML. In fact, primary keys are denoted by underlining the attribute or combination of attributes that serve as the primary key in an entity.

Question 11

In Unified Modeling Language (UML) the options for minimum multiplicity values are 0, 1, and 2.

Accepted Answer

In UML, the minimum multiplicity values include 0 and 1, but it can also be any non-negative integer, not limited to just 2.

Question 12

In Unified Modeling Language (UML) the options for maximum multiplicity values are 1 and *.

Accepted Answer

The answer of In Unified Modeling Language (UML) the options...

Question 13

In Unified Modeling Language (UML) the options for maximum multiplicity values are 0 and *.

Accepted Answer

The maximum multiplicity values in UML can be any positive integer or the special value "*", representing an unbounded upper limit.

Question 14

Unified Modeling Language (UML) Class diagrams describe the logical structure of a database system.

Accepted Answer

UML Class diagrams are used to describe the logical structure of objects and their relationships, which can be used to model the classes and relationships in a database system.

Question 15

Obligatory business rules state what should occur.

Accepted Answer

The answer of Obligatory business rules state what should occur....

Question 16

In Unified Modeling Language (UML) foreign keys allow tables to be linked together in a database.

Accepted Answer

The answer of In Unified Modeling Language (UML) foreign keys...

Question 17

An aggregation relationship is a form of generalization relationships.

Accepted Answer

An aggregation relationship represents a "whole/part" relationship between aggregate (whole) and component parts, whereas a generalization relationship represents an "is-a" relationship between a more general element and a more specific element.

Question 18

In Unified Modeling Language (UML) primary keys cannot by NULL.

Accepted Answer

In UML, primary keys are denoted by underlined attributes and are mandatory, meaning they cannot be NULL.

Question 19

In Unified Modeling Language (UML) the options for minimum multiplicity values are 1 and *.

Accepted Answer

The options for minimum multiplicity values are 0 or 1, not just 1, in UML. A minimum multiplicity of * represents 0 or more occurrences.

Question 20

Associations can indicate the roles that one Class takes in its business relationship with another Class.

Accepted Answer

Associations in UML can represent the business relationships between classes, including the roles each class takes in those relationships.

Quiz 3: Data Modeling