In order to qualify as a subclass of an abstract class, a classmust offer concrete implementations for all of the abstractmethods defined in the abstract parent class. Exactly how doyou feel about this?

Answered: In order to qualify as a subclass of an…

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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In order to qualify as a subclass of an abstract class, a class
must offer concrete implementations for all of the abstract
methods defined in the abstract parent class. Exactly how do
you feel about this?

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Step 1

Introduction:

In computers, abstract type in programming languages is a non-navigable type in a nominative type system. Directly instantiated; a concrete type is a type that can be directly instantiated. Every instance of an abstract class is a concrete subtype instance.

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