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Hadoop · Q28

MapReduce Programming Model

Programming · Hadoop · question 28

Q28

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

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

Answer: Option B

Solution

Answer: Option B
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