Is null or empty java?


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More Core Java Interview Questions

Do extraneous variables affect validity?

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What is the use of collections in java? How it is implemented in real time applications?

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What is difference between static class and normal class?

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what is difference between type 4 driver and type 1 driver?

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What is map and hashmap? also tell the difference.

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Explain what pure virtual function is?

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Does java allow overriding static methods ?

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7) Suppose there is Student class like class student { int age; string name; } We want to store these objects in a HashMap. Do we need to override any methods in Student class? If any which ones and why? what if i just override equals or just hashcode? what will be the results in both the cases?

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how to create constants in java?

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Describe string intern() methodology

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How do you use nextline in java?

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What is the symbol for average?

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