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Vendor: Hortonworks
Exam Code: HADOOP-PR000007
Exam Name: Hortonworks Certified Apache Hadoop 2.0 Developer (Pig and Hive Developer)
Certification: HCAHD
Total Questions: 108 Q&A
Updated on: Nov 15, 2024
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Which one of the following statements describes the relationship between the ResourceManager and the ApplicationMaster?
A. The ApplicationMaster requests resources from the ResourceManager
B. The ApplicationMaster starts a single instance of the ResourceManager
C. The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
D. The ApplicationMaster starts an instance of the ResourceManager within each Container
In a MapReduce job, the reducer receives all values associated with same key. Which statement best describes the ordering of these values?
A. The values are in sorted order.
B. The values are arbitrarily ordered, and the ordering may vary from run to run of the same MapReduce job.
C. The values are arbitrary ordered, but multiple runs of the same MapReduce job will always have the same ordering.
D. Since the values come from mapper outputs, the reducers will receive contiguous sections of sorted values.
You've written a MapReduce job that will process 500 million input records and generated 500 million key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant amount of intermediate data that it needs to transfer between mappers and reduces which is a potential bottleneck. A custom implementation of which interface is most likely to reduce the amount of intermediate data transferred across the network?
A. Partitioner
B. OutputFormat
C. WritableComparable
D. Writable
E. InputFormat
F. Combiner
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