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what is the Hadoop MapReduce APIs contract for a key and value class?


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More MapReduce Interview Questions

When Namenode is down what happens to job tracker?

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What MapReduce framework consists of?

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Which Sorting algorithm is used in Hadoop MapReduce?

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what job does the conf class do?

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What are ‘maps’ and ‘reduces’?

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What is a "map" in Hadoop?

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What is SequenceFileInputFormat in Hadoop MapReduce?

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When is it suggested to use a combiner in a MapReduce job?

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Is there any point of learning mapreduce, then?

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What are mapreduce new and old apis while writing map reduce program?. Explain how it works

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What is the next step after Mapper or MapTask?

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What is partitioner and its usage?

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