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20 Cards in this Set
- Front
- Back
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Object
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a self-contained entity that contains both data and code in the form of subroutines and functions to manipulate and access the data
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An object-oriented view of a software package would have
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buttons, edit controls, windows, data, and so on as objects.
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The state of an object is
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the internal information that describes the object.
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The state of a check box object indicates what?
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a check box object indicates whether the check box is checked or unchecked.
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What do you call an object that is able to change it's own state?
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Actors, Active Objects or Objects with life
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State information is typically internal to an object.
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True
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This is an entity with a well-defined boundary, state, behavior, and identity.
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An Object
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What defines an object's functionality, characteristics, and identity.
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Classes
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A class could be thought of as what?
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It can be thought of as a pattern or template from which to build objects.
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What is an object of a class type
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Instance
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Each instance has all of the functionality, data, and characteristics of what?
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The class that it belongs to.
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What is a fundamental and powerful feature of classes?
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The capability to build a new class from another class.
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What do you call the capability to build a new class from another class?
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Deriving a class
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What is one advantage to building applications from simple classes and inheriting them to build more complex classes?
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you can focus your development on a class's unique characteristics.
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What is the advantage of this: you inherit a window class to make a button class?
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The button class doesn't have to deal with anything the window class already does. The button class can focus on what a button does and leave what a window does to the window class.
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The member data stores the state information of an object when a class is what?
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Instantiated
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Why is it acceptable to think of objects as black boxes?
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Because only the implementer knows how the data is stored and how the functionality is implemented.
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What can define the scope of member data and functionality that determines the type of access users have to an object's member data and functionality?
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A class
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The scope of member data and functionality can be what?
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private, protected, or public.
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When you define a class's member data and/or methods that won't be directly accessed by other classes or classes that inherit from this class, you declare them as what?
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Private
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