Q. In advanced MapReduce, what is the purpose of the Hadoop MapReduce "Map-side Aggregation" technique?
-
(A)
Aggregate values on the mapper side
-
(B)
Combine intermediate key-value pairs on the mapper side
-
(C)
Sort and shuffle data
-
(D)
Distribute data to reducers
✅ Correct Answer: (B)
Combine intermediate key-value pairs on the mapper side