What is mapreduce algorithm?
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How hadoop mapreduce works?
Where is the output of Mapper written in Hadoop?
What is identity mapper and chain mapper?
Detail description of the Reducer phases?
How to write a custom partitioner for a Hadoop MapReduce job?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is the fundamental difference between a MapReduce InputSplit and HDFS block?
What do you know about nlineinputformat?
Explain Working of MapReduce?
What is a scarce system resource?
What are ‘reduces’?
how Hadoop is different from other data processing tools?
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