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What is the need of MapReduce in Hadoop?
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In MapReduce how to change the name of the output file from part-r-00000?
What is a map side join?
What is the inputsplit in map reduce software?
For a job in Hadoop, is it possible to change the number of mappers to be created?
What are the advantages of using map side join in mapreduce?
Illustrate a simple example of the working of MapReduce.
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
How can we control particular key should go in a specific reducer?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
when do reducers play their role in a mapreduce task?
Can we submit the mapreduce job from slave node?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
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