Question

______________ class allows the Map/Reduce framework to partition the map outputs based on certain key fields, not the whole keys.
a) KeyFieldPartitioner
b) KeyFieldBasedPartitioner
c) KeyFieldBased
d) None of the mentioned

Answer 1

Answer: b) KeyFieldBasedPartitioner
Explanation: The primary key is used for partitioning, and the combination of the primary and secondary keys is used for sorting.