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Which interface should your class implement?

You are developing a combiner that takes as input Text keys, IntWritable values, and emits Text
keys, Intwritable values. Which interface should your class implement?

PrepAway - Latest Free Exam Questions & Answers

A.
Mapper <Text, IntWritable, Text, IntWritable>

B.
Reducer <Text, Text, IntWritable, IntWritable>

C.
Reducer <Text, IntWritable, Text, IntWritable>

D.
Combiner <Text, IntWritable, Text, IntWritable>

E.
Combiner <Text, Text, IntWritable, IntWritable>

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