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What is the role of recordreader in hadoop mapreduce?


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More MapReduce Interview Questions

What is the default input type in MapReduce?

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How does fault tolerance work in mapreduce?

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what is a sequence file in Hadoop?

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What is a scarce system resource?

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What are the primary phases of a Reducer?

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What happens when a datanode fails ?

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How to set the number of mappers for a MapReduce job?

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

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Explain the Reducer's reduce phase?

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Why the output of map tasks are stored (spilled ) into local disc and not in hdfs?

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Why Mapreduce output written in local disk?

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

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