How to create a custom key and custom value in MapReduce Job?


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More MapReduce Interview Questions

what is NameNode in Hadoop?

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What is an identity mapper and identity reducer?

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What is a Speculative Execution in Hadoop MapReduce?

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What are ‘maps’ and ‘reduces’?

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

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Explain combiners.

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What happen if the number of the reducer is 0 in MapReduce?

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what is storage and compute nodes?

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What are the steps involved in MapReduce framework?

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Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?

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Is it possible to search for files using wildcards?

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

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