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What is the Hadoop in built serialization framework ?



Writables are the hadoop’s own serialization format which serializes the data into compact size and ensures fast transfer across nodes. Writables are written in Java and supported by Java only.
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  • What are the main components of Mapreduce Job ?
      Main driver class which provides job configuration parameters. Mapper class which must extend org.apache.hadoop.mapredu...
  • TO_CHAR
       This will be used to extract various date formats.     The available date formats as follows.     Syntax: to_char ( date , fo...