Can you tell us how many daemon processes run on a hadoop system?
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Where sorting is done in Hadoop MapReduce Job?
What are the primary phases of a Reducer?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
Is it possible to search for files using wildcards?
What is LazyOutputFormat in MapReduce?
How to get the single file as the output from MapReduce Job?
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
How can you add the arbitrary key-value pairs in your mapper?
Compare RDBMS with Hadoop MapReduce.
What is partitioning in MapReduce?
What are the data components used by Hadoop?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
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