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?
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, __________.
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What is the noun technique?
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What is a key difference between brainstorming and noun technique?
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What are some steps to follow when using the noun technique?
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What are attributes in the context of domain modeling?
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Why could the noun list be long?
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What is an identifier or key?
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What is a compound attribute?
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What does association mean in UML?
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What is cardinality?
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What does multiplicity measure?
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What are multiplicity constraints?
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What are binary associations?
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What is an n-ary association?
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What do data requirements include?
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What is an Entity-Relationship Diagram (ERD)?
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What is a semantic net useful for?
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What is a class in domain modeling?
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What is a class diagram?
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What is an abstract class?
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What does inheritance refer to?
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What is the purpose of systems analysis and design in the development of information systems?
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What is agile development?
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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.