What is the utility of using Writable Comparable Custom Class in Map Reduce code?
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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?
How to set the number of mappers for a MapReduce job?
Can you tell us how many daemon processes run on a hadoop system?
What is heartbeat in hdfs? Explain.
What is the need of MapReduce?
What is the process of changing the split size if there is limited storage space on Commodity Hardware?
What is the sequence of execution of Mapper, Combiner, and Partitioner in MapReduce?
When the reducers are are started in a mapreduce job?
What is the problem with the small file in Hadoop?
what are the three modes in which Hadoop can be run?
Write a Mapreduce Program for Character Count ?
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