
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- Write a code using abstract data types, classes, and inheritance methods as in the example below. Do not use the car class exemplified, but think of any similar use of such a class and adapt it to your idea. Make sure to follow all the requirements set below: Creating the Car Class Motorvehicles Solutions, Inc. is a business that sells cars and leasing services. You are a programmer in the company's IT department, and your team is designing a program to manage all of the cars that are in the inventory. You have been asked to design a class that represents a car. The data that should be kept as attributes in the class are as follows: The name of the car's manufacturer will be assigned to the __manufact attribute. The car's model number will be assigned to the __model attribute The car's retail price will be assigned to the __retail_price attribute The car's leasing price will be assigned to the __leasing_price attribute The class will also have the following methods: An __init__…arrow_forwardWhat is the primary reason to use inheritance? when you want to include multiple classes in the same .java file when there is an "is-a" relationship when you want to avoid duplicating code when there is a "has-a" relationshiparrow_forwardcombines attributes and methods into one unit and hides its internal structure of objects. Select one: a.Information hiding b.Inheritance c.Polymorphism d.Encapsulationarrow_forward
- A lot of these patterns feel very powerful and useful for abstracting and re-using code. Although, I am curious to know as to the extent in which a class "should" be extended in order to prevent unwanted bugs or over-use of a base class that could lead to a chain of inheritance that becomes too brittle.?arrow_forwardDesign and implement a set of classes that define a series of threedimensional geometric shapes. For each shape, store fundamental data about its size, and provide methods to access and modify the data. In addition, provide appropriate methods to compute each shape’s circumference, area, and volume. In your design, consider how shapes are related and thus where inheritance can be implemented. Create a driver class to instantiate several shapes of differing types and exercise the behavior you providedarrow_forwardHow can we ensure a method is not overridden by a subclass? a. Making a method private will make it so the subclass cannot see the method, and it will not be able to override it and change its functionality. b. The protected keyword will protect the method from being overridden. c. The purpose of inheritance is to allow a sub-class to change any implementation of the parent class, so we cannot stop a method from being overridden. d. If the method does not appear in the interface we implement, the sub-class will not override it.arrow_forward
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