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CCA-410 · Question #50
CCA-410 Question #50: Real Exam Question with Answer & Explanation
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Question
How many mappers required for a map reduce, job determine on a cluster running map reduce V1 (MRv1)?
Options
- AThe number mappers is equal to no of input splits calculated by client submitting
- Bthe developer specifies the number in the job configuration
- Cthe jobtracker chooses the number based on no of available nodes
- DThe number of mappers is calculated by namenode based on the number of HDFS blocks in the files
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