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Hortonworks Exam HDPCD Topic 1 Question 22 Discussion

Actual exam question for Hortonworks's Hortonworks Data Platform Certified Developer exam
Question #: 22
Topic #: 1
[All Hortonworks Data Platform Certified Developer Questions]

When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?

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Suggested Answer: A

You can use your reducer code as a combiner if the operation performed is commutative and associative.


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