a) “Inheritance should be used only if the relationship is-a is maintained throughout the lifetime of the objects involved; otherwise, aggregation is the best choice. If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship." Describe the HAS-A relationship. By using a scenario, show how it can be implemented. b) Write a Java program that will ask the user to input ten integers in an array. The program will display the digits on screen, will calculate the sum and finally will output the sum on screen.

a) “Inheritance should be used only if the relationship is-a is maintained throughout the lifetime of the objects involved; otherwise, aggregation is the best choice. If a class have an entity reference, it is known as Aggregation. Aggregation represents HAS-A relationship." Describe the HAS-A relationship. By using a scenario, show how it can be implemented. b) Write a Java program that will ask the user to input ten integers in an array. The program will display the digits on screen, will calculate the sum and finally will output the sum on screen.

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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