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Five Basic Concepts of Object-Oriented Design

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You are designing a program for payroll. The Tax class has a method to calculate tax rates based on pay. You want to keep this method and its variables invisible to other classes. They can access the method but don't get to see its details. This is an example of _____.

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1. You are designing a program for vehicles. Some of the class names include Semi, Compact, and SUV. If we create a new semi, it is said that the semi is a(n) _____ of a(n) _____.

2. An object-oriented design consists of periodical and publication data. The hierarchy of classes, from top to bottom is as follows: Publication -> Book -> Novel. If the Novel class gains all methods and fields from the Book class, this is an example of which of the concepts of Object Oriented Design?

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