What is the need of key-value pair to process the data in MapReduce?


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More MapReduce Interview Questions

What is Hadoop Map Reduce ?

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What is the need of MapReduce?

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Explain the process of spilling in MapReduce?

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How does Mappers run method works?

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Define Writable data types in Hadoop MapReduce?

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How many InputSplits is made by a Hadoop Framework?

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How many Mappers run for a MapReduce job?

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What happens when a DataNode fails during the write process?

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Explain the Reducer's Sort phase?

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Which are the methods in the mapper interface?

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Explain the input type/format in mapreduce by default?

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How to compress mapper output in Hadoop?

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