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Is it mandatory to set input and output type/format in MapReduce?
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when do reducers play their role in a mapreduce task?
What is a IdentityMapper and IdentityReducer in MapReduce ?
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What is MapReduce in Hadoop?
How can we control particular key should go in a specific reducer?
In mapreduce what is a scarce system resource? Explain?
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Can we rename the output file?
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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
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