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Explain about the basic parameters of mapper and reducer function


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More MapReduce Interview Questions

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

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What is a TaskInstance?

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How much space will the split occupy in Mapreduce?

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What is the difference between a MapReduce InputSplit and HDFS block?

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

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How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

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List the configuration parameters that have to be specified when running a MapReduce job.

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How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?

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How to specify more than one directory as input in the Hadoop MapReduce Program?

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Why MapReduce uses the key-value pair to process the data?

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Where sorting is done on mapper node or reducer node in MapReduce?

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Map reduce jobs take too long. What can be done to improve the performance of the cluster?

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