Domain Modeling Flashcards

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Questions and Answers

What is the problem domain?

The specific area of the user's business need that is within the scope of the new system.

Which of the following are the two most common techniques for identifying problem domain classes?

Noun Technique (correct)

Brainstorming (correct)

Interviewing

Surveys

What is the brainstorming technique?

A technique used to identify problem domain classes by collaborating with users to discuss different types of things they use in their work.

The steps to follow when using Brainstorming technique include: Identify user & set Use Case/ User Stories, __________.

Brainstorming with user to identify things involved when carrying out the case. Signup and view all the answers

What is the noun technique?

A technique used to identify things in the problem domain by finding and classifying the nouns in a dialog or description. Signup and view all the answers

What is a key difference between brainstorming and noun technique?

In brainstorming, analysts interact with users, while in noun technique, they list nouns without engaging users. Signup and view all the answers

What are some steps to follow when using the noun technique?

Identify nouns from use cases, add items from existing systems, refine the list, review with users. Signup and view all the answers

What are attributes in the context of domain modeling?

Descriptive pieces of information about things or objects. Signup and view all the answers

Why could the noun list be long?

Because many of the nouns are actually attributes. Signup and view all the answers

What is an identifier or key?

An attribute the value of which uniquely identifies an individual thing or object. Signup and view all the answers

What is a compound attribute?

An attribute that consists of multiple pieces of information but is best treated in the aggregate. Signup and view all the answers

What does association mean in UML?

A term that describes a naturally occurring relationship between specific things. Signup and view all the answers

What is cardinality?

A measure of the number of links in a particular relationship between a thing and one or more other things. Signup and view all the answers

What does multiplicity measure?

A measure of the number of links in a particular association between a thing and one or more other things. Signup and view all the answers

What are multiplicity constraints?

The actual numeric count of the constraints on things allowed in an association. Signup and view all the answers

What are binary associations?

Associations between exactly two distinct types of things. Signup and view all the answers

What is an n-ary association?

An association between n distinct types of things. Signup and view all the answers

What do data requirements include?

Data entities, their attributes, and relationships. Signup and view all the answers

What is an Entity-Relationship Diagram (ERD)?

A diagram consisting of data entities, their attributes, and their relationships. Signup and view all the answers

What is a semantic net useful for?

For thinking through and verifying the entities and relationships in an ERD and the classes in a class diagram. Signup and view all the answers

What is a class in domain modeling?

A category or classification of a set of objects or things. Signup and view all the answers

What is a class diagram?

A diagram consisting of classes and associations among the classes. Signup and view all the answers

What is an abstract class?

A class that only exists in a model so subclasses can inherit from it. Signup and view all the answers

What does inheritance refer to?

The concept that specialization classes inherit characteristics of the generalization class. Signup and view all the answers

What is the purpose of systems analysis and design in the development of information systems?

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What is agile development?

An information system development process that emphasizes flexibility and rapid response to new and changing requirements. Signup and view all the answers

Study Notes

Problem Domain

Refers to the specific area of the user's business need that guides the design and functionalities of a new system.

Common Techniques for Domain Modeling

Brainstorming: Collaborative method involving users to identify classes relevant to their work.
Noun Technique: Involves identifying and classifying nouns from dialogue or descriptions relevant to the system.

Steps for Brainstorming Technique

Identify users and set Use Cases/User Stories.
Collaborate with users to identify components involved in a use case.
Systematically question types of things identified.
Engage with various users and stakeholders to expand the list of ideas.
Merge results, eliminate duplicates, and compile an initial list.

Steps for Noun Technique

Identify nouns from use cases, actors, and system information.
Supplement with nouns from existing systems and procedures.
Refine the list while questioning the relevance of each noun.
Compile a definitive list noting whether to include, exclude, or research further.
Review and refine the list with users and stakeholders.

Attributes and Identifiers

Attributes: Descriptive details about objects within the system.
A noun list may be extensive due to many nouns functioning as attributes.
Identifier/Key: An attribute that uniquely identifies an individual instance.

Types of Associations and Their Characteristics

Association: Relationship between entities in UML.
Relationship: Describes links between entities in database management.
Cardinality: Indicates the number of associations in a relationship.
Multiplicity: Similar to cardinality but specifically in UML.

Types of Associations

Binary: Involves two distinct entities.
Unary/Recursive: Involves instances of the same entity.
Ternary: Involves three distinct entities.
n-ary: Involves n distinct types of entities.

Data Entities and ERD

Data Entities: Things about which the system will store information.
Data Requirements: Includes entities, their attributes, and relationships.
Entity-Relationship Diagram (ERD): Visual representation of data entities, their attributes, and relationships.

Class Definitions and Diagrams

Class: A category or classification of objects.
Semantic Net: Illustrates objects within a class and their relationships.
Domain Classes: Represents objects from the problem domain with attributes and associations.
Class Diagram: Diagram showing classes and their associations.

Advanced Class Relationships

Generalization/Specialization: Hierarchical relationships where subordinate classes are subsets of superior classes.
Superclass: The more general class in this hierarchical structure.
Subclass: The more specialized class.
Inheritance: Subclasses inherit characteristics from their superclass.

Association Classes and Relationships

Whole-Part Relationships: Classes where one class is a component of another.
Aggregation: Components exist independently from the whole.
Composition: Components cannot exist independently from the whole.

State Management in Objects

State: Condition of an object during its life cycle.
Transition: Movement from one state to another.
State Machine Diagram: Visual representation of an object's life cycle through states and transitions.

Additional State Diagram Elements

Pseudostate: The starting point of a state machine diagram.
Destination State and Origin State: The states involved in a particular transition.
Action Expressions: Activities performed during a transition.
Guard Condition: A test to determine if a transition can occur.

Concurrency in State Management

Concurrency: Being in multiple states simultaneously.
Path: A sequence of connected states and transitions.
Concurrent Paths: Parallel states in different paths.

Systems Analysis and Agile Development

Focuses on the purpose of effectively developing information systems.
Agile Development: Emphasizes adaptability and rapid response to changing requirements during the development phase.

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Description

Test your knowledge of domain modeling concepts from Chapter 4 with these flashcards. Learn key terms, techniques, and their definitions essential for understanding problem domains in software development. Perfect for anyone studying system design.

Domain Modeling Flashcards - Chapter 4

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