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What is a combiner and where you should use it?
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What is KeyValueTextInputFormat in Hadoop MapReduce?
What is partitioning in MapReduce?
How to write a custom partitioner for a Hadoop MapReduce job?
Explain the process of spilling in MapReduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What are the advantages of using map side join in mapreduce?
In MapReduce how to change the name of the output file from part-r-00000?
How can you add the arbitrary key-value pairs in your mapper?
Which Sorting algorithm is used in Hadoop MapReduce?
What happens when a datanode fails ?
Name job control options specified by mapreduce.
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