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Is it necessary to write a mapreduce job in java?
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What is partitioner and its usage?
How hadoop mapreduce works?
How many Mappers run for a MapReduce job?
How many Reducers run for a MapReduce job?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
What are the various configuration parameters required to run a mapreduce job?
Why Hadoop MapReduce?
What are ‘maps’ and ‘reduces’?
What is a TaskInstance?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
How data is spilt in Hadoop?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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