Explain task granularity


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More MapReduce Interview Questions

How to specify more than one directory as input in the Hadoop MapReduce Program?

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What is a combiner and where you should use it?

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What is the difference between an RDBMS and Hadoop?

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How to set the number of mappers for a MapReduce job?

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what does the conf.setMapper Class do ?

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Clarify what combiners are and when you should utilize a combiner in a map reduce job?

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What are the four essential parameters of a mapper?

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For a Hadoop job, how will you write a custom partitioner?

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What is a Speculative Execution in Hadoop MapReduce?

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Does Partitioner run in its own JVM or shares with another process?

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What are the identity mapper and reducer in MapReduce?

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Is it mandatory to set input and output type/format in MapReduce?

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