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What is the primary difference between an abstract class and an interface in Java regarding abstraction?

Q: Answer-What is the primary difference between an abstract class and an interface in Java regarding abstract...

o Abstract classes are still classes they can have constructors, instance variables fields, and both abstract and concrete methods. They can also contain state. o Interfaces are contracts that define a set of methods that a class must implement. Before Java 8, interfaces could only have abstract methods and public static final fields. Since Java 8, they can have default and static methods, and since Java 9, private methods. However, interfaces cannot have constructors or instance variables non-static fields.

A Abstract classes can have constructors, while interfaces cannot.

B Abstract classes can achieve 100% abstraction, while interfaces can only achieve partial abstraction.

C Interfaces can have concrete methods, while abstract classes cannot.

D A class can implement multiple abstract classes but can only extend one interface.

E Abstract classes are used for data hiding, while interfaces are for method signatures.

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What is the primary difference between an abstract class and an interface in Java regarding abstraction?

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