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For a Hadoop job, how will you write a custom partitioner?
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What is the InputSplit in map reduce ?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
What are the advantages of using map side join in mapreduce?
What do you understand by compute and storage nodes?
What is the difference between map and reduce?
What are the four essential parameters of a mapper?
How does inputsplit in mapreduce determines the record boundaries correctly?
How to configure the number of the Combiner in MapReduce?
List out Hadoop's three configuration files?
If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
Why do we need MapReduce during Pig programming?
Why can aggregation not be done in Mapper in MapReduce?
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