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How to set the number of reducers?


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More MapReduce Interview Questions

What are the advantages of using map side join in mapreduce?

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What combiners are and when you should use a combiner in a mapreduce job?

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What is the function of mapreduce partitioner?

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Explain what is “map” and what is "reducer" in hadoop?

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What is MapReduce in Hadoop?

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What is shuffling in mapreduce?

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Explain what does the conf.setmapper class do?

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What are the advantages of using mapreduce with hadoop?

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Can you tell us how many daemon processes run on a hadoop system?

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Define the purpose of the partition function in mapreduce framework

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What is KeyValueTextInputFormat in Hadoop MapReduce?

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How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.

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