Which of the following situations described is a good situation to use an abstract class, and...

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Programming

Which of the following situations described is a good situationto use an abstract class, and where it would be better to use thaneither a concrete class or an interface?
When some methods in the class are abstract and some areconcrete, and some variables in the class need to be private, whileother variables need to be public
When the inheriting class is closely related to the abstractclass, such as with an \"is-a\" relationship
When the objects instantiated from the abstract class hierarchyneed to be grouped together
When the class will have both concrete and abstract methods
All of the above are reasons to use an abstract class over aconcrete class or an interface

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All of the above reasons are to use an abstarct class over a concrete class or interface Explanation Abstract class os a class declared abstract It may or may not contain See Answer

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		When some methods in the class are abstract and some areconcrete, and some variables in the class need to be private, whileother variables need to be public
		When the inheriting class is closely related to the abstractclass, such as with an \"is-a\" relationship
		When the objects instantiated from the abstract class hierarchyneed to be grouped together
		When the class will have both concrete and abstract methods
		All of the above are reasons to use an abstract class over aconcrete class or an interface