Java Interview Questions

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Short Core Java Interview Questions ?

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Considering the basic properties of Vector and ArrayList, where will you use Vector and where will you use ArrayList ?

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What is an enumeration ?

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What is the difference between the size and capacity of a Vector ?

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How does a try statement determine which catch clause should be used to handle an exception ?

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What are the steps in the JDBC connection ?

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Can applets communicate with each other ?

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If I write System.exit (0); at the end of the try block, will the finally block still execute ?

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What is the basic difference between the 2 approaches to exception handling…1> try catch block and 2> specifying the candidate exceptions in the throws clause? When should you use which approach ?

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What happens to an unhandled exception ?

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If my class already extends from some other class what should I do if I want an instance of my class to be thrown as an exception object ?

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If I want an object of my class to be thrown as an exception object, what should I do ?

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Why do we need wrapper classes ?

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What happens to the static fields of a class during serialization? Are these fields serialized as a part of each serialized object ?

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Objects are passed by value or by reference ?

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