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How do reducers communicate with each other?
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Different ways of debugging a job in MapReduce?
What is Reducer in MapReduce?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
What are the various configuration parameters required to run a mapreduce job?
Define speculative execution?
How many Reducers run for a MapReduce job?
How to submit extra files(jars, static files) for Hadoop MapReduce job during runtime?
what daemons run on a master node and slave nodes?
What is heartbeat in hdfs?
What is the difference between Job and Task in MapReduce?
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