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what is NameNode in Hadoop?


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More MapReduce Interview Questions

How to sort intermediate output based on values in MapReduce?

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

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

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In Map Reduce why map write output to Local Disk instead of HDFS?

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When is it not recommended to use MapReduce paradigm for large scale data processing?

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What is shuffling in mapreduce?

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MapReduce Types and Formats and Setting up a Hadoop Cluster?

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

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When is it suggested to use a combiner in a MapReduce job?

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Explain how do ‘map’ and ‘reduce’ work?

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Developing a MapReduce Application?

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What are ‘maps’ and ‘reduces’?

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