What is MapReduce?



What is MapReduce?..

Answer / bindu

It is data processing layer of hadoop.map and reduce are the two tasks for processing data in hadoop.

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More MapReduce Interview Questions

What platform and Java version is required to run Hadoop?

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What happens when a DataNode fails during the write process?

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Explain JobConf in MapReduce.

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What is the need of MapReduce in Hadoop?

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How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.

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

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What is a scarce system resource?

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

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What is the problem with the small file in Hadoop?

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In mapreduce what is a scarce system resource? Explain?

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

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What are the four basic parameters of a reducer?

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