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|Java - Interview Questions and Answers|
|Ans. Such a class still can have member elements which can be inherited and hence facilitate code reuse. Moreover Abstract class can have non final static elements whereas interfaces are only allowed to have static final elements.|
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|Differences between abstract class and interface ?|
|Difference between Abstract and Concrete Class ?|
|What are the design considerations while making a choice between using interface and abstract class ?|
|How is Abstraction implemented in Java ?|
|Difference between Base Class, Derived Class , Abstract Class and Concrete Class ?|
|What is an abstract class ?|
|Shall we use abstract classes or Interfaces in Policy / Strategy Design Pattern ?|
|Will this code Work ? If not , Why ?|
|Is java.util.Date an abstract Class ? Is java.util.Calendar an abstract Class ?|