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What is the use of InputFormat in MapReduce process?
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How hadoop mapreduce works?
What is the problem with the small file in Hadoop?
How can we assure that the values regarding a particular key goes to the same reducer?
What is the relation between MapReduce and Hive?
When should you use a reducer?
what are the three modes in which Hadoop can be run?
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?
What are the various input and output types supported by mapreduce?
What is a partitioner and how the user can control which key will go to which reducer?
Explain the Reducer's reduce phase?
What is the Reducer used for?
What comes in Hadoop 2.0 and MapReduce V2 YARN
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