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What is Abstract class?
What is interface?
Difference between Abstract class and inteface?
Can we make a class abstract without abstract method?
Can we make a class final and abstract?
Can we declare constructor in abstract class in Java?
Can an interface extend more than one interface in Java?
Can a class extend more than one class in Java?
Can we have non abstract method inside interface?
What is default method of Java 8?
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