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Point out the wrong statement.

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Point out the wrong statement.

(a) The map function in Hadoop MapReduce have the following general form:map:(K1, V1) -> list(K2, V2)

(b) The reduce function in Hadoop MapReduce have the following general form: reduce: (K2, list(V2)) -> list(K3, V3)

(c) MapReduce has a complex model of data processing: inputs and outputs for the map and reduce functions are key-value pairs

(d) None of the mentioned

I have been asked this question at a job interview.

I'm obligated to ask this question of Data Flow topic in division HDFS – Hadoop Distributed File System of Hadoop

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Correct option is (c) MapReduce has a complex model of data processing: inputs and outputs for the map and reduce functions are key-value pairs

Easy explanation: MapReduce is relatively simple model to implement in Hadoop.

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