Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
37 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Name 4 guidelines for naming a class
|
*Start with a capital letter
*Be centered in the top compartment *Be written in a boldface font *Be written in italics if the class is abstract |
CCBI
|
|
|
How many compartments may a class have?
|
As many compartments as required to describe the class
|
Lots
|
|
|
How is an instance of an object shown
|
Object name followed by the class, i.e., Ford : Car. It is also underlined.
|
|
|
|
What are attributes?
|
Attributes are used to represent the details of a class. They describe the properties of an instance.
|
|
|
|
How is an attribute shown (diagrammed)?
|
Either inline or by a relationship.
|
Two ways
|
|
|
How is the visibility of an attribute represented?
|
Use the following symbols: +, -, #, or ~ for public, private, protected, or package, respectively
|
|
|
|
How is the name of an attribute normally capitalized?
|
Typically the first letter is lowercase, and the first letter of each subsequent word is capitalized.
|
It's all up from the start.
|
|
|
What is the type of an attribute?
|
another classifier, typically a class, interface, or built-in type like int.
|
|
|
|
How is the multiplicity of an attribute represented?
|
multiplicity ::= [lower..upper] use * to represent 0 or more. [1 .. *] indicates one or more an integer [3] represents exactly 3
|
|
|
|
What are the property strings of an attribute?
|
denote such things as ordering or uniqueness. They are surrounded by {} and separated by commas.
|
|
|
|
What are attribute constraints?
|
one or more restrictions placed on an attribute. They may be natural language or use a formal grammar such as the OCL.
|
|
|
|
How is an optional attribute diagrammed?
|
The attribute name is preceeded by a "/".
|
|
|
|
How do you represent a set of ordered attributes?
|
-orderedAttrib[4]{ordered}
|
|
|
|
If the uniqueness constraint of an attribute is not specified what is the default value?
|
{unique}
|
|
|
|
How do denote that an attribute is not unique?
|
-orderedAttrib[4]{ordered, no unique}
|
|
|
|
Name some common attribute properties.
|
readOnly, union, subsets , composite
|
|
|
|
What are constraints?
|
restrictions placed on an element
|
|
|
|
What common property must all constraints have?
|
They must evaluate to a boolean value.
|
|
|
|
What are static attributes?
|
attributes of the class rather than of an instance of the class
|
part of the type
|
|
|
How are static attributes designated?
|
They are underlined.
|
|
|
|
What are operations?
|
Operations are features of classes that specify how to invoke a particular behavior.
|
|
|
|
Write the general syntax expression for an operation.
|
visibility name ( parameters ) : return-type {properties}
|
VNPRP
|
|
|
Write the general syntax expression for an operation parameter.
|
direction parameter_name : type [ multiplicity ]
= default_value { properties } |
DPTMDP
|
|
|
What are the 4 possible parameter directions. Indicate how each type is used by the operation.
|
in, out, inout, return
|
IOIR
|
|
|
What is the purpose of an operation constraint?
|
A constraint defines a contract that indicates how an operation interacts with the rest of the system.
|
Contract
|
|
|
What is a precondition?
|
A precondition is a constraint that specifies the state of the system that must exist before an operation is invoked.
|
|
|
|
Show an example of a precondition.
|
use "precondition: foo must equal bar" for example
|
|
|
|
What is a postcondition?
|
A post condition establishes the post operation state of the system that must be met.
|
|
|
|
What is a bodyCondition?
|
A constraint that restricts the possible values of the return values.
|
|
|
|
What is a query operation?
|
A query operation is a constraint that indicates that the operation does not change the system state in any way.
|
|
|
|
Is an exception a constraint?
|
No, but an exception may be expressed in a similar manner.
|
|
|
|
How is an exception to an operation indicated?
|
Use a note attached by a dotted line.
|
|
|
|
What is a static operation?
|
A static operation is an operation that is invoked on the class itself rather than an instance of a class.
|
acts on the class
|
|
|
How is a static operation indicated?
|
The signature is underlined.
|
|
|
|
What is a method?
|
A method is the actual implementation of an operation.
|
|
|
|
How is a method noted?
|
There is no specific notation for an operation.
|
|
|
|
What is an abstract class?
|
A class that has one or more operations without signatures.
|
|
