Question

Point out the wrong statement.

(a) The framework calls reduce method for each <key, (list of values)> pair in the grouped inputs

(b) The output of the Reducer is re-sorted

(c) reduce method reduces values for a given key

(d) None of the mentioned

I have been asked this question by my school teacher while I was bunking the class.

This question is from Java Interface in section HDFS – Hadoop Distributed File System of Hadoop

Answer 1

Right choice is (b) The output of the Reducer is re-sorted

The best explanation: The output of the Reducer is not re-sorted.