Unit 6 Flashcards
For a use case diagram, the _____ shows what is included in the system and what is not included in the system.
system boundary
A class can belong to a more general category called a _____.
superclass
_____ is a widely used method of visualizing and documenting an information system.
Unified Modeling Language (UML)
An object has certain _____, which are characteristics that describe the object, such as the make, model, and color of a car.
attributes
The line from the actor to the use case is called a(n) _____.
association
A(n) _____ shows the object classes and relationships involved in a use case.
class diagram
The black box concept is an example of _____, which means that all data and methods are self-contained.
encapsulation
The concept that a message gives different meanings to different objects is called _____.
polymorphism
The focus indicates when an object sends or receives a message.
True
A black box wants and needs outside interference.
False
In a state transition diagram, the circle at the right with a hollow border is the initial state.
False
Encapsulation allows objects to be used as modular components anywhere in the system.
True
By limiting access to internal processes, an object prevents its internal code from being altered by another object or process.
True
An object includes data, but not the processes that affect that data.
False
An object represents a real person, place, event, or transaction.
True
Systems analysts define an object’s attributes during the systems design process.
True
A collection of related webpages is called a _____.
website
Which tool is used to apply multiple search engines simultaneously?
meta-search engine
When a person subscribes to a list, he or she can receive a collection of messages called a _____, which contains a summary of the postings for a specific time interval (e.g., daily).
digest
Which operator is used to exclude certain records in a search?
NOT
The same message to two different objects produces the same results.
False
There are few CASE tools tailored to UML
False
A control is a specific member of a class.
False
Classes that send or receive messages are shown at the bottom of the sequence diagram.
False
_____ enable objects to communicate and interact as they perform business functions and transactions required by a system.
Relationships
The Unified Modeling Language (UML) represents an object as a _____ with the object name at the top, followed by the object’s attributes and methods.
rectangle
An _____ shows the objects and how they interact to perform business functions and transactions.
object relationship diagram
The _____ of an object is an adjective that describes the object’s current status.
State
An object’s _____ are the tasks or functions that the object performs when it receives a command to do so.
Methods
