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How many times combiner is called on a mapper node in Hadoop?


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More MapReduce Interview Questions

what does the text input format do?

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Detail description of the Reducer phases?

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

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what does the conf.setMapper Class do ?

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How to set mappers and reducers for MapReduce jobs?

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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Differentiate Reducer and Combiner in Hadoop MapReduce?

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Describe what happens to a mapreduce job from submission to output?

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

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Why is Apache Spark faster than Hadoop MapReduce?

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How can we control particular key should go in a specific reducer?

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With the help of two examples name the map and reduce function purpose

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