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Which of the following writes MapFiles as output?

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Which of the following writes MapFiles as output?

(a) DBInpFormat

(b) MapFileOutputFormat

(c) SequenceFileAsBinaryOutputFormat

(d) None of the mentioned

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This question is from Mapreduce Formats in section MapReduce Types and Formats of Hadoop

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Correct answer is (c) SequenceFileAsBinaryOutputFormat

The explanation: SequenceFileAsBinaryOutputFormat writes keys and values in raw binary format into a SequenceFile container.

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