Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- What advantages do Interfaces have over abstract classes when it comes to performance?arrow_forwardIn Java, a class can only inherit from one other ------- . A class can, however, extend many ----------.arrow_forwardInheritance is a white box approach to design where composition is black box. We want black box design if possible because it better decouples our code. We should thus favor composition over inheritance. True/Falsearrow_forward
- 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?arrow_forwardA 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_forwardExplain through each question about Classes and Objects in Java. What is encapsulations and why is it useful? What is an instance method and how does it differ from the static methods we learned previously? What is a mutator method? What is an accessor method? What is a constructor in a Java class? What is an implicit parameter? Please provide an entire coding example to illustrate the answer.arrow_forward
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