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Home / Core Java / Questions on java.util.* and java.io.* package

Questions on java.util.* and java.io.* package

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What is Collection?

Explain List,Set and Map.

What is the serialization?

What is the difference between Serializable and Externalizable interface?

What is memory leak?

Difference between ArrayList and Vector class?

What is the difference between Hashtable and HashMap?

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Core Java

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