Podcast
Questions and Answers
What is the strongest relationship between objects according to the provided content?
What is the strongest relationship between objects according to the provided content?
- Cardinality
- Composition (correct)
- Aggregation
- Association
What is the relationship between a Tree and its Leaf?
What is the relationship between a Tree and its Leaf?
- Aggregation
- Association
- Inheritance
- Composition (correct)
What is the relationship between a Business and its Departments?
What is the relationship between a Business and its Departments?
- Inheritance
- Composition (correct)
- Association
- Aggregation
What is the term used to describe the 'has-a' relationship between objects?
What is the term used to describe the 'has-a' relationship between objects?
What is the relationship between a Student and a Person?
What is the relationship between a Student and a Person?
What type of relationship is characterized by 'uses'?
What type of relationship is characterized by 'uses'?
What is the term used to describe the number of objects in a relationship?
What is the term used to describe the number of objects in a relationship?
What type of relationship is characterized by 'consist of'?
What type of relationship is characterized by 'consist of'?
What is the primary purpose of UML?
What is the primary purpose of UML?
What is an example of a part-whole relationship in object-oriented programming?
What is an example of a part-whole relationship in object-oriented programming?
What is the main difference between aggregation and composition?
What is the main difference between aggregation and composition?
What type of relationship is represented by the 'has-a' phrase?
What type of relationship is represented by the 'has-a' phrase?
What is the term for a class that contains a collection of objects?
What is the term for a class that contains a collection of objects?
What is an association in object-oriented programming?
What is an association in object-oriented programming?
What is the term for a class that is contained by another class?
What is the term for a class that is contained by another class?
What is the term for a whole that is composed of multiple parts?
What is the term for a whole that is composed of multiple parts?
What is the primary purpose of UML in software development?
What is the primary purpose of UML in software development?
What type of relationship is represented by a 'uses' or 'references' relationship between classes?
What type of relationship is represented by a 'uses' or 'references' relationship between classes?
What is the main difference between aggregation and composition?
What is the main difference between aggregation and composition?
What is an example of a composition relationship?
What is an example of a composition relationship?
What type of relationship is represented by a 'has-a' relationship between classes?
What type of relationship is represented by a 'has-a' relationship between classes?
What is the main characteristic of an association relationship?
What is the main characteristic of an association relationship?
What is an example of an aggregation relationship?
What is an example of an aggregation relationship?
What is the main difference between an aggregation and a composition relationship?
What is the main difference between an aggregation and a composition relationship?
What is the relationship between Circle and GeometricShape?
What is the relationship between Circle and GeometricShape?
What type of relationship exists between Circle and its attributes?
What type of relationship exists between Circle and its attributes?
What is the relationship between Rectangle and Square?
What is the relationship between Rectangle and Square?
What type of relationship exists between GeometricShape and its subclasses?
What type of relationship exists between GeometricShape and its subclasses?
What is the relationship between Circle and its behaviors?
What is the relationship between Circle and its behaviors?
What type of relationship exists between cuboid and Three Dim GeometricObject?
What type of relationship exists between cuboid and Three Dim GeometricObject?
What is the relationship between GeometricShape and its attributes?
What is the relationship between GeometricShape and its attributes?
What type of relationship exists between Rectangle and its dimensions?
What type of relationship exists between Rectangle and its dimensions?
What does the solid diamond on one end of a line in a UML class diagram indicate?
What does the solid diamond on one end of a line in a UML class diagram indicate?
What is the relationship between objects of two classes connected by a line with a solid diamond on one end?
What is the relationship between objects of two classes connected by a line with a solid diamond on one end?
What is the association between two classes represented by a simple line in a UML class diagram?
What is the association between two classes represented by a simple line in a UML class diagram?
What does the cardinality 0..1 indicate in a UML class diagram?
What does the cardinality 0..1 indicate in a UML class diagram?
What does the cardinality 1..* indicate in a UML class diagram?
What does the cardinality 1..* indicate in a UML class diagram?
In a UML class diagram, what is the difference between an aggregation and a composition?
In a UML class diagram, what is the difference between an aggregation and a composition?
What is the difference between an association and a has-a relationship?
What is the difference between an association and a has-a relationship?
In a UML class diagram, what is the purpose of the access level modifiers?
In a UML class diagram, what is the purpose of the access level modifiers?
Study Notes
Relationships between Objects
- Composition: A Vehicle has a Cabin and Trunk Space, which do not exist without the enclosing Vehicle.
- A Business is composed of Departments, which do not exist without the Business.
- A Student has a Person (with personal properties), which do not exist without the Person.
UML – Unified Modeling Language
- A general-purpose developmental modeling language.
- A standard way to visualize the design of a system.
- Many types of languages exist.
Uses of UML
- As a sketch: to communicate aspects of the system during brainstorming.
- As a blueprint: a complete design to be implemented.
- As a programming language: tools available to auto-generate the structure of the code from the UML.
UML Diagrams
- Association: a general relationship between classes.
- Aggregation: a special form of association where Class A has Class B as a property.
- Composition: a restricted form of aggregation where the Part cannot exist without the Whole.
Association
- Weakest relationship between classes.
- Class A uses/references Class B.
- Examples: Employee class & Scanner class, Owner class & Pet class.
Aggregation
- A special form of association where Class A has Class B as a property.
- Examples: A duck has-a pond, College has multiple students.
Composition
- A restricted form of aggregation where the Part cannot exist without the Whole.
- Examples: A Vehicle has-a Cabin and Trunk Space, A Business is composed of Departments.
UML Class Diagram
- Top compartment: class name (centered and bold).
- Middle compartment: State (attributes, properties, instance or class variables).
- Bottom compartment: Behaviors (methods).
- Access Level Modifiers: + (public), # (protected), ~ (package protected), - (private).
UML Relationships
- Lines drawn between class boxes indicate relationships between objects of the classes.
- Cardinality: numbers at either end of an association line represent how many of each are involved.
Inheritance
- Circle and Rectangle are subclasses of Geometric Shape.
- Circle and Rectangle are subtypes of supertype GeometricShape.
- Circle inherits all attributes of Geometric Shape.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz explores the concept of composition in object-oriented relationships, where objects are composed of other objects that do not exist independently. Examples include vehicles, businesses, and students.
