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Hadoop · Q13

MapReduce Programming Model

Programming · Hadoop · question 13

Q13

What is the purpose of the MapReduce "Combine" phase?

A.
Combine intermediate key-value pairs on the mapper side
Answer
B.
Distribute data to reducers
C.
Aggregate values on the reducer side
D.
Sort and shuffle data

Answer: Option A

Solution

Answer: Option A
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