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What do sorting and shuffling do?


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More MapReduce Interview Questions

Developing a MapReduce Application?

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What is the Reducer used for?

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What is a "map" in Hadoop?

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What does a split do?

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How to specify more than one directory as input to the MapReduce Job?

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How to overwrite an existing output file during execution of mapreduce jobs?

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What is identity mapper and reducer? In which cases can we use them?

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Explain the general mapreduce algorithm

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List out Hadoop's three configuration files?

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What is the Hadoop MapReduce API contract for a key and value Class?

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What MapReduce framework consists of?

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what is WebDAV in Hadoop?

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