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Devika Ray
Asked: 2022-11-05T01:00:28+05:30 In:

______________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.

(a) MultithreadedRunner

(b) MultithreadedMap

(c) MultithreadedMapRunner

(d) SinglethreadedMapRunner

______________ is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.

(a) MultithreadedRunner

(b) MultithreadedMap

(c) MultithreadedMapRunner

(d) SinglethreadedMapRunner
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  1. Correct choice is (c) MultithreadedMapRunner

    Easiest 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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