
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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How does inheritance support code reuse and make code easier to maintain?
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- . Draw an inheritance hierarchy representing parts of a computer system (processor, memory, disk drive, DVD drive, printer, scanner, keyboard, mouse, etc.). (BlueJ)arrow_forwardIn Java, a class can only inherit from one other ------- . A class can, however, extend many ----------.arrow_forwardHow are base class members inherited via public inheritance? Explain.arrow_forward
- What kind of data type can hold a 32-bit signed integer?arrow_forwardWhen discussing a class that was created via the use of inheritance, you must refer to both the class that you inherit from and the class that you are inheriting as "the class." This is your opportunity to provide feedback.arrow_forwardClass Relationships Exercises 1. In Java, we use inheritance for "is-a" relationships. Containment, on the other hand, indicates that one object has another object. These are "has-a" relationships. For the following relationships, determine if they are a "is-a" or a "has-a" relationship: o bicycle - vehicle o car - engine o pizza - topping o food - pizza o dog - mammal 2. Share with someone else 3 other examples for each of the following relationships: o Inheritance ("is-a" relationship) o Containment ("has-a" relationship) 3. public class PersonInfo { protected String firstName; protected String birthdate; } public class ChildInfo extends PersonInfo { private String schoolName; } public class MotherInfo extends PersonInfo { private String spousename; private ChildInfo children1; private ChildInfo children2; private ChildInfo children3; ... } A. Draw the relationships for the classes above using UML. If a class inherits from another class, draw an open arrow pointing to the base class…arrow_forward
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