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Explain Working of MapReduce?
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What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What are the four essential parameters of a mapper?
What is the Hadoop MapReduce API contract for a key and value Class?
what are the three modes in which Hadoop can be run?
Define Writable data types in MapReduce?
Which Sorting algorithm is used in Hadoop MapReduce?
What is reduce side join in mapreduce?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
what is "map" and what is "reducer" in Hadoop?
Illustrate a simple example of the working of MapReduce.
Explain job scheduling through JobTracker
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