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On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.

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On a tasktracker, the map task passes the split to the createRecordReader() method on InputFormat to obtain a _________ for that split.

(a) InputReader

(b) RecordReader

(c) OutputReader

(d) None of the mentioned

The question was asked during an online exam.

I want to ask this question from Data Flow in section HDFS – Hadoop Distributed File System of Hadoop

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Right choice is (b) RecordReader

To explain I would say: The RecordReader loads data from its source and converts into key-value pairs suitable for reading by mapper.

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