UML Collections
40 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

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?

  • Aggregation
  • Association
  • Inheritance
  • Composition (correct)

    • 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?

    <p>Aggregation</p> Signup and view all the answers

    What is the relationship between a Student and a Person?

    <p>Composition</p> Signup and view all the answers

    What type of relationship is characterized by 'uses'?

    <p>Association</p> Signup and view all the answers

    What is the term used to describe the number of objects in a relationship?

    <p>Cardinality</p> Signup and view all the answers

    What type of relationship is characterized by 'consist of'?

    <p>Composition</p> Signup and view all the answers

    What is the primary purpose of UML?

    <p>To model and visualize software systems</p> Signup and view all the answers

    What is an example of a part-whole relationship in object-oriented programming?

    <p>A car has wheels</p> Signup and view all the answers

    What is the main difference between aggregation and composition?

    <p>Composition is a stronger relationship than aggregation</p> Signup and view all the answers

    What type of relationship is represented by the 'has-a' phrase?

    <p>Has-a</p> Signup and view all the answers

    What is the term for a class that contains a collection of objects?

    <p>Collection class</p> Signup and view all the answers

    What is an association in object-oriented programming?

    <p>A relationship between two classes</p> Signup and view all the answers

    What is the term for a class that is contained by another class?

    <p>Inner class</p> Signup and view all the answers

    What is the term for a whole that is composed of multiple parts?

    <p>Aggregate</p> Signup and view all the answers

    What is the primary purpose of UML in software development?

    <p>To communicate aspects of the system through sketching</p> Signup and view all the answers

    What type of relationship is represented by a 'uses' or 'references' relationship between classes?

    <p>Association</p> Signup and view all the answers

    What is the main difference between aggregation and composition?

    <p>Composition is a stronger has-a relationship, while aggregation is a weaker has-a relationship</p> Signup and view all the answers

    What is an example of a composition relationship?

    <p>A car has an engine</p> Signup and view all the answers

    What type of relationship is represented by a 'has-a' relationship between classes?

    <p>Aggregation</p> Signup and view all the answers

    What is the main characteristic of an association relationship?

    <p>One class uses or references the other class</p> Signup and view all the answers

    What is an example of an aggregation relationship?

    <p>A duck has a pond</p> Signup and view all the answers

    What is the main difference between an aggregation and a composition relationship?

    <p>Aggregation is a weaker has-a relationship, while composition is a stronger has-a relationship</p> Signup and view all the answers

    What is the relationship between Circle and GeometricShape?

    <p>Circle is a subtype of GeometricShape</p> Signup and view all the answers

    What type of relationship exists between Circle and its attributes?

    <p>Has-a Relationship</p> Signup and view all the answers

    What is the relationship between Rectangle and Square?

    <p>Square is a subtype of Rectangle</p> Signup and view all the answers

    What type of relationship exists between GeometricShape and its subclasses?

    <p>Inheritance</p> Signup and view all the answers

    What is the relationship between Circle and its behaviors?

    <p>Has-a Relationship</p> Signup and view all the answers

    What type of relationship exists between cuboid and Three Dim GeometricObject?

    <p>Inheritance</p> Signup and view all the answers

    What is the relationship between GeometricShape and its attributes?

    <p>Has-a Relationship</p> Signup and view all the answers

    What type of relationship exists between Rectangle and its dimensions?

    <p>Has-a Relationship</p> Signup and view all the answers

    What does the solid diamond on one end of a line in a UML class diagram indicate?

    <p>Aggregation</p> Signup and view all the answers

    What is the relationship between objects of two classes connected by a line with a solid diamond on one end?

    <p>Part-Whole Relationship</p> Signup and view all the answers

    What is the association between two classes represented by a simple line in a UML class diagram?

    <p>Association</p> Signup and view all the answers

    What does the cardinality 0..1 indicate in a UML class diagram?

    <p>Zero or one</p> Signup and view all the answers

    What does the cardinality 1..* indicate in a UML class diagram?

    <p>One or more</p> Signup and view all the answers

    In a UML class diagram, what is the difference between an aggregation and a composition?

    <p>Aggregation is weaker than composition</p> Signup and view all the answers

    What is the difference between an association and a has-a relationship?

    <p>An association is a more general term than a has-a relationship</p> Signup and view all the answers

    In a UML class diagram, what is the purpose of the access level modifiers?

    <p>To indicate the access level of class members</p> Signup and view all the answers

    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.

    Quiz Team

    Related Documents

    AC-S24-OOP-Lect04-Part2-UML-Collections.pdf

    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.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser