What happens when a DataNode fails during the write process?
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What is the difference between Reducer and Combiner in Hadoop MapReduce?
Explain job scheduling through JobTracker
What is the need of key-value pair to process the data in MapReduce?
What is the problem with the small file in Hadoop?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
Is it possible to rename the output file?
Name job control options specified by mapreduce.
What are the data components used by Hadoop?
What is an input reader in reference to mapreduce?
What is an identity mapper and identity reducer?
What is Counter in MapReduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
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