Database Design: The second stage of DBLC (Database Life cycle) is the database design. DBLC is a sequential process which is used to trace the history of the application that is present within the information system . The design phase consists of three stages and they are: Conceptual design Design a database that is independent of software and physical details. Logical design The main design goal is to make an enterprise wide database. Design a database that is based on the specific data model but independent of physical details. Physical design It is used to determine the storage capabilities of the data in an organization and its access characteristics. It ensures the integrity, security and performance.

Question

In a shopping cart, there are various items, which can either belong to the category of household items or electronic items. The following UML diagram illustrates the relationship between items, household items, and electronic items. //Implementation Class public class ShoppingCart{ public static void main(String[] args){ final int MAX_ITEM = 50; Item cart = new Item[MAX_ITEM]; addItem(cart); // populate the item array printItem(cart); } } Considering that all the data definition classes and the implementation class are complete, which of the following Object-Oriented Programming (OOP) concepts do you need to use in the above context? i) Polymorphism ii) Method Overloading iii) Method Overriding iv) Dynamic Binding v) Abstract Class Explain, using course terminology, how you would use any of the above concepts to model the given scenario.

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Chapter 9, Problem 13RQ

Program Plan Intro

Database Design:

The second stage of DBLC (Database Life cycle) is the database design.

DBLC is a sequential process which is used to trace the history of the application that is present within the information system.

The design phase consists of three stages and they are:

Conceptual design

Design a database that is independent of software and physical details.

Logical design

The main design goal is to make an enterprise wide database.

Design a database that is based on the specific data model but independent of physical details.

Physical design

It is used to determine the storage capabilities of the data in an organization and its access characteristics.

It ensures the integrity, security and performance.

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