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How many Mappers run for a MapReduce job?
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What comes in Hadoop 2.0 and MapReduce V2 YARN
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
What is the Reducer used for?
What is the Job interface in MapReduce framework?
What is a TaskInstance?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
Define the purpose of the partition function in mapreduce framework
What are the advantages of using mapreduce with hadoop?
In MapReduce Data Flow, when Combiner is called?
What is identity mapper and reducer? In which cases can we use them?
What is Hadoop Map Reduce ?
What are the primary phases of a Reducer?
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