Question 1

Object-oriented analysis (OOA) techniques are used to (1) study existing objects to see if they can be reused or adapted for new uses; and (2) define new or modified objects that will be combined with existing objects into a useful business computing application.

Accepted Answer

Object-oriented analysis involves examining existing objects for reuse and defining new objects to create or enhance applications, aligning with the principles of object-oriented design.

Question 2

An object is something that is or is capable of being seen, touched, or otherwise sensed, and about which users store data and associate behavior.

Accepted Answer

An object in programming and data contexts refers to an entity that can be identified and manipulated, often encapsulating data and behavior, aligning with the definition provided.

Question 3

Attributes are the data that represents characteristics of interest about an object.

Accepted Answer

Attributes are indeed data that describe or represent characteristics or properties of an object, often used in databases and programming to define specific qualities or features of an entity.

Question 4

An attribute is something that is or is capable of being seen, touched or otherwise sensed, and about which users store data and associate behavior.

Accepted Answer

An attribute is a property or characteristic of an entity, often used in databases to describe data fields, but it is not necessarily something that can be physically sensed.

Question 5

Behavior refers to those things that the object can do and that correspond to functions that act on the object's data (or attributes). This is commonly referred to as a method, operation or service.

Accepted Answer

In object-oriented programming, behavior refers to the methods or functions that define what an object can do, acting on its data or attributes.

Question 6

Behavior is the packaging of several items together into one unit.

Accepted Answer

Behavior refers to the actions or reactions of an individual or group in response to external or internal stimuli, not the packaging of items.

Question 7

An object class is a set of object instances that share the same attributes and behavior.

Accepted Answer

An object class defines a blueprint for creating objects, specifying the attributes (data) and behaviors (methods) that the instances of the class will have.

Question 8

An object instance is a set of object classes that share the same attributes and behavior.

Accepted Answer

An object instance is a specific realization of an object class, not a set of object classes. It represents a single entity with the attributes and behaviors defined by its class.

Question 9

Inheritance means that methods and attributes defined in an object class can be inherited or reused by another object class.

Accepted Answer

Inheritance is a fundamental concept in object-oriented programming where a class (subclass) can inherit attributes and methods from another class (superclass), allowing for code reuse and the creation of hierarchical class structures.

Question 10

A supertype is an object class whose instances store attributes that are common to one or more subtypes of the object class.

Accepted Answer

A supertype is a general class that holds common attributes for its subtypes, which are more specialized classes.

Question 11

A subtype is an object class whose instances store attributes that are common to one or more supertypes of the object class.

Accepted Answer

A subtype is an object class whose instances have specific attributes that are not shared with other subtypes, but they inherit attributes from their supertype.

Question 12

An object class relationship is a natural business association that exists between one or more object classes.

Accepted Answer

An object class relationship represents how different object classes are connected or associated in a business context, reflecting real-world interactions or dependencies.

Question 13

A message is passed when one object invokes one or more of another object's methods (behaviors) to request information or some action.

Accepted Answer

In object-oriented programming, a message is a request for an object to invoke one of its methods, which is how objects communicate and interact with each other.

Question 14

An attribute is passed when one object invokes one or more of another object's methods (behaviors) to request information or some action.

Accepted Answer

An attribute is a property or characteristic of an object, not an action or method invocation. Methods are invoked to perform actions or request information.

Question 15

Polymorphism means "many forms." Applied to object-oriented techniques, it means that the same named behavior may be completed differently for different object classes.

Accepted Answer

Polymorphism in object-oriented programming allows methods to do different things based on the object it is acting upon, even if they share the same name.

Question 16

Encapsulation means "many forms." Applied to object-oriented techniques, it means that the same named behavior may be completed differently for different object classes.

Accepted Answer

Encapsulation refers to the bundling of data and methods that operate on that data within a single unit or class, and restricting access to some of the object's components. The concept described in the statement is actually polymorphism, not encapsulation.

Question 17

Use case diagrams graphically depict the interactions between the system and external systems and users. In other words, they graphically describe who will use the system and in what ways the user expects to interact with the system.

Accepted Answer

Use case diagrams are a type of UML diagram that show the interactions between a system and its external actors (users or other systems), illustrating the different ways the system is used.

Question 18

Activity diagrams depict the sequential flow of a use case or business process.

Accepted Answer

Activity diagrams are used in UML to represent the flow of control or data in a system, illustrating the sequence of activities involved in a use case or business process.

Question 19

Class diagrams depict the system's object structure. They show object classes that the system is composed of as well as the relationships between those classes.

Accepted Answer

Class diagrams are a type of static structure diagram in UML that illustrate the classes within a system and the relationships between them, representing the system's object structure.

Question 20

There are thirteen diagrams used in UML 2.0.

Accepted Answer

UML 2.0 includes thirteen types of diagrams, which are categorized into two groups: structural diagrams and behavioral diagrams.

Quiz 10: Object-Oriented Analysis and Modeling Using the Uml