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Hadoop - Quiz(MCQ)
__________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.
A)
MultithreadedMap
B)
MultithreadedRunner
C)
MultithreadedMapRunner
D)
SinglethreadedMapRunner

Correct Answer :   MultithreadedMapRunner


Explanation : A RecordReader is little more than an iterator over records, and the map task uses one to generate record key-value pairs, which it passes to the map function.

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