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Java Interview Questions

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Can a level class be private or protected ?

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What is the default value of an object reference declared as an instance variable ?

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Does importing a package imports the subpackages as well? e.g. Does importing com.MyTest.* also import com.MyTest.UnitTests.* ?

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Are the imports checked for validity at compile time? e.g. will the code containing an import such as java.lang.ABCD compile ?

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If I do not provide any arguments on the command line, then the String array of Main method will be empty of null ?

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What is final ?

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What is an abstract class ?

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State the significance of public, private, protected, default modifiers both singly and in combination and state the effect of package relationships on declared items qualified by these modifiers ?

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Difference between Swing and Awt ?

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Explain different way of using thread ?

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What is the difference between an Interface and an Abstract class ?

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More questionson Java Collections

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Java Questions based on Object Serialization

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Java Garbage Collection Interview Questions

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21 Java Interview Questions

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