Q# Which of the following might have only method signatures? Group of answer choices 1. An interface 2. An abstract class and a concrete class 3. An abstract class 4. An interface and an abstract class 5. None of these, they all require the implementation. 6. A concrete class

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
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Q# Which of the following might have only method signatures?
Group of answer choices
1. An interface
2. An abstract class and a concrete class
3. An abstract class
4. An interface and an abstract class
5. None of these, they all require the implementation.
6. A concrete class
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