What is the Reducer used for?
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Does Partitioner run in its own JVM or shares with another process?
What are the configuration parameters in the 'MapReduce' program?
What is the need of MapReduce in Hadoop?
Explain how mapreduce works.
How to optimize MapReduce Job?
What is a Distributed Cache in Hadoop?
Clarify what combiners are and when you should utilize a combiner in a map reduce job?
Developing a MapReduce Application?
When should you use sequencefileinputformat?
What are the advantages of using mapreduce with hadoop?
What do you mean by shuffling and sorting in MapReduce?
What is heartbeat in hdfs?
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