What is a "map" in Hadoop?


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More MapReduce Interview Questions

Can we submit the mapreduce job from slave node?

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Explain JobConf in MapReduce.

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What is an identity mapper and identity reducer?

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What main configuration parameters are specified in mapreduce?

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Explain the input type/format in mapreduce by default?

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Is it possible to split 100 lines of input as a single split in MapReduce?

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Where sorting is done on mapper node or reducer node in MapReduce?

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what is the Hadoop MapReduce APIs contract for a key and value class?

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How many Mappers run for a MapReduce job in Hadoop?

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How hadoop mapreduce works?

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Explain about the partitioning, shuffle and sort phase in MapReduce?

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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

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