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Hortonworks Exam HDPCD Topic 3 Question 25 Discussion
Actual exam question for
Hortonworks's
Hortonworks Data Platform Certified Developer exam
Question #: 25
Topic #: 3
[All Hortonworks Data Platform Certified Developer Questions]
Topic #: 3
In a large MapReduce job with m mappers and n reducers, how many distinct copy operations will there be in the sort/shuffle phase?
Suggested Answer:
A
A MapReduce job with m mappers and r reducers involves up to m * r distinct copy operations, since each mapper may have intermediate output going to every reducer.
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