What is map/reduce job in hadoop?
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what is the Hadoop MapReduce APIs contract for a key and value class?
Explain task granularity
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
Explain job scheduling through JobTracker
What are the advantages of using map side join in mapreduce?
Explain the differences between a combiner and reducer
What is the best way to copy files between HDFS clusters?
In MapReduce Data Flow, when Combiner is called?
Where the mapper's intermediate data will be stored?
What is a mapreduce algorithm?
Why MapReduce uses the key-value pair to process the data?
What do you mean by shuffling and sorting in MapReduce?
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