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You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as well as interfaces. (True/False)

You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as well as interfaces. (True/False)

Database System Concepts
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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Please answer both. Thank you.

You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as well as interfaces. (True/False)
Transcribed Image Text:You only can instantiate concrete classes, not abstract ones. But you can extend abstract classes as well as interfaces. (True/False)
Both an abstract class and an interface cannot be instantiated, but abstract classes can contain implemented or partially implemented methods and constructors in addition to data. (True/False)
Transcribed Image Text:Both an abstract class and an interface cannot be instantiated, but abstract classes can contain implemented or partially implemented methods and constructors in addition to data. (True/False)
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