Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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**Understanding Privacy Principles in Object-Oriented Programming** In object-oriented programming, it's crucial to comprehend the privacy principles associated with public base classes and private base classes, as well as their derived classes. Here, we will break down these concepts to ensure clarity and understanding for all learners. 1. **Public Base Class:** - **Access and Inheritance:** When a class is derived from a public base class, all public members of the base class remain public in the derived class, allowing direct access. - **Protection Level:** Members declared as protected in the base class become protected in the derived class. - **Encapsulation:** Public inheritance is used when the derived class needs to exhibit "is-a" relationship prominently, meaning it is a specific type of the base class. 2. **Private Base Class:** - **Access and Inheritance:** In private inheritance, all public and protected members of the base class become private members of the derived class. - **Limiting Access:** This means the derived class can still use these members, but they are not accessible outside the derived class. - **Encapsulation:** Private inheritance is used when the derived class needs to implement some behavior of the base class without exposing it to the outside world, focusing on "contains" rather than "is-a." By understanding these principles, software developers can effectively utilize inheritance while maintaining control over data exposure and class behavior in any object-oriented programming language.
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Transcribed Image Text:**Understanding Privacy Principles in Object-Oriented Programming** In object-oriented programming, it's crucial to comprehend the privacy principles associated with public base classes and private base classes, as well as their derived classes. Here, we will break down these concepts to ensure clarity and understanding for all learners. 1. **Public Base Class:** - **Access and Inheritance:** When a class is derived from a public base class, all public members of the base class remain public in the derived class, allowing direct access. - **Protection Level:** Members declared as protected in the base class become protected in the derived class. - **Encapsulation:** Public inheritance is used when the derived class needs to exhibit "is-a" relationship prominently, meaning it is a specific type of the base class. 2. **Private Base Class:** - **Access and Inheritance:** In private inheritance, all public and protected members of the base class become private members of the derived class. - **Limiting Access:** This means the derived class can still use these members, but they are not accessible outside the derived class. - **Encapsulation:** Private inheritance is used when the derived class needs to implement some behavior of the base class without exposing it to the outside world, focusing on "contains" rather than "is-a." By understanding these principles, software developers can effectively utilize inheritance while maintaining control over data exposure and class behavior in any object-oriented programming language.
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