When it doesn't make sense to have objects of that class To prevent developers from further extending the class When default implementations of some methods are no When it makes sense to have objects of that class.

Microsoft Visual C#
7th Edition
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Joyce, Farrell.
Chapter10: Introduction To Inheritance
Section: Chapter Questions
Problem 20RQ
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In Java, declaring a class abstract is useful ...
When it doesn't make sense to have objects of that class.
To prevent developers from further extending the class.
When default implementations of some methods are not desirable.
When it makes sense to have objects of that class.
Transcribed Image Text:In Java, declaring a class abstract is useful ... When it doesn't make sense to have objects of that class. To prevent developers from further extending the class. When default implementations of some methods are not desirable. When it makes sense to have objects of that class.
Which statement is true about interfaces?
An interface cannot have static members.
O An interface can extend several other interfaces.
An interface can be final.
O
An interface can have a private method.
Transcribed Image Text:Which statement is true about interfaces? An interface cannot have static members. O An interface can extend several other interfaces. An interface can be final. O An interface can have a private method.
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