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Q:
Why do we need Serialization in Hadoop map reduce methods?

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In Hadoop, there are multiple data nodes that hold data. During the processing of map and reduce methods data may transfer from one node to another node. Hadoop uses serialization to convert the data from Object structure to Binary format.

With serialization, data can be converted to binary format and with de-

 

serialization data can be converted back to Object format with reliability.

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