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Explain about the basic parameters of mapper and reducer function


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More MapReduce Interview Questions

What is the core of the job in MapReduce framework?

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when do reducers play their role in a mapreduce task?

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It can be possible that a Job has 0 reducers?

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What happens when a datanode fails ?

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What is a "reducer" in Hadoop?

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What does conf.setmapper class do?

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How to write MapReduce Programs?

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What is the difference between Reducer and Combiner in Hadoop MapReduce?

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Is it important for Hadoop MapReduce jobs to be written in Java?

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In mapreduce what is a scarce system resource? Explain?

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What happens when a DataNode fails during the write process?

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What is KeyValueTextInputFormat in Hadoop MapReduce?

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