EJB Interview Questions

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Is Is it possible to have abstract class without any concrete methods

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in which scenerio we use interfaces,abstract and concrete class?Which one is better and appropriate?Differentiate these three terms in depth.

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What is the difference between Abstract Factory Pattern and factory Pattern?

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What is the difference between abstract and final classes?

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What are interfaces, abstract classes. What is their purpose and differences ?

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What is an abstract class?

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What is the need of an abstract class?

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why can’t we create object for an abstract class?

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What is the difference between abstract class and interface?

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If we can’nt make the object of abstract class what is the use of defining of data members and non abstract functions in that abstract class?

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How different are interface and abstract class in .Net?

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Why cant one make an object of abstract class?Give compiler view of statement

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What is practical difference between abstract class and interface? What is practical implementation of polymorphism?

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can we create a object of Base class?..

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abstract class can be declared as final

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