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?
A.
Combiner <Text, IntWritable, Text, IntWritable>
B.
Mapper <Text, IntWritable, Text, IntWritable>
C.
Reducer <Text, Text, IntWritable, IntWritable>
D.
Reducer <Text, IntWritable, Text, IntWritable>
E.
Combiner <Text, Text, IntWritable, IntWritable>