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How can you add the arbitrary key-value pairs in your mapper?


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More MapReduce Interview Questions

How do reducers communicate with each other?

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

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How to set the number of mappers to be created in MapReduce?

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What is the key- value pair in Hadoop MapReduce?

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How to set mappers and reducers for Hadoop jobs?

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What is the default value of map and reduce max attempts?

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What is a combiner and where you should use it?

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Explain combiners.

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What is the best way to copy files between HDFS clusters?

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Explain about the partitioning, shuffle and sort phase

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how can you check whether Namenode is working beside using the jps command?

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How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?

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