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What is the need of key-value pair to process the data in MapReduce?


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More MapReduce Interview Questions

When should you use sequencefileinputformat?

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How many Mappers run for a MapReduce job?

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How to specify more than one directory as input to the MapReduce Job?

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What is the Job interface in MapReduce framework?

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MapReduce Types and Formats and Setting up a Hadoop Cluster?

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In Hadoop, which file controls reporting in Hadoop?

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Explain what does the conf.setMapper Class do in MapReduce?

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What are the disservices of utilizing Apache Spark over Hadoop MapReduce?

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Explain about the basic parameters of mapper and reducer function

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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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what daemons run on a master node and slave nodes?

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What is a IdentityMapper and IdentityReducer in MapReduce ?

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