Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Abstract classes and interfaces may both be used to accomplish the goal of defining the behavior of common objects.
Which factors should you take into account when deciding whether to utilize an interface or an abstract class?
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Java is a general-purpose programming language that is used to develop a wide range of applications, from web-based applications to desktop software and mobile apps. It is a strongly-typed, object-oriented language that is designed to be portable and platform-independent, meaning that code written in Java can be run on any platform that has a Java Virtual Machine (JVM) installed.
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- Interfaces are used to define stronger is-a relationships because one class can inherit multiple interfaces. Ture or falsearrow_forwardAn object can be created from an abstract class is it true or falsearrow_forwardWhy would someone declare a class as abstract? How might Interfaces help you to achieve multiple inheritance?arrow_forward
- To what use does it serve for a class to have its own destructor?arrow_forwardBoth abstract classes and interfaces may be used to specify the behavior of common objects.Which factors should you examine when deciding between an interface and an abstract class?arrow_forwardIn 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?arrow_forward
- A subclass of an abstract class must provide concrete implementations for each of the parent class's abstract methods in order to be considered a subclass. What are your thoughts on this?arrow_forwardWhat is the role of abstract classes and interfaces in achieving polymorphism?arrow_forwardSubclasses of abstract classes must implement the parent class's abstract methods. You think?arrow_forward
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