In UML class diagram given below, which attributes and behaviors of the Animal class would be inherited by the Dog class? Animal # numberOfLegs: #numberOfTails: # name: String + walk() + run() + eat() + playFetch() int int Dog
In UML class diagram given below, which attributes and behaviors of the Animal class would be inherited by the Dog class? Animal # numberOfLegs: #numberOfTails: # name: String + walk() + run() + eat() + playFetch() int int Dog
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

Transcribed Image Text:**Understanding Inheritance in UML Class Diagrams**
In UML class diagrams, inheritance is a fundamental concept used to depict relationships between classes. The diagram provided illustrates an inheritance relationship between the "Animal" class and the "Dog" class.
**Class Definitions:**
- **Animal Class:**
- **Attributes:**
- `# numberOfLegs: int`
- `# numberOfTails: int`
- `# name: String`
- **Behaviors/Methods:**
- `+ walk()`
- `+ run()`
- `+ eat()`
- **Dog Class:**
- **Behaviors/Methods:**
- `+ playFetch()`
**Diagram Explanation:**
The diagram is structured with "Animal" at the top, indicating it as the superclass, and "Dog" below it, showing the subclass relationship with an arrow pointing upwards to "Animal." This arrow indicates that "Dog" inherits characteristics from "Animal."
**Inheritance Implications:**
- The "Dog" class inherits all attributes (`numberOfLegs`, `numberOfTails`, `name`) and behaviors (`walk()`, `run()`, `eat()`) from the "Animal" class.
- Additionally, "Dog" can have its specific method, `playFetch()`, which is not part of the "Animal" class.
**Multiple Choice Answers:**
- **A:** None of the attributes and behaviors are inherited.
- **B:** `numberOfLegs`, `numberOfTails`, `walk()`, `run()`, `eat()`
- **C:** All attributes and behaviors of "Animal" are inherited.
- **D:** `playFetch()`
**Correct Answer:**
**C:** All attributes and behaviors of "Animal" are inherited by the "Dog" class, in addition to having its specific method `playFetch()`.
Expert Solution

Step 1
There is no limit to how tall or wide a hierarchy or inheritance tree can be. UML class diagrams indicate inheritance with an arrow pointing from a subclass to a superclass. An open arrow joins the superclass, while the plain (unadorned end) joins the subclass.
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