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


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More MapReduce Interview Questions

How many numbers of reducers run in Map-Reduce Job?

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what is WebDAV in Hadoop?

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how Hadoop is different from other data processing tools?

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What are the various InputFormats in Hadoop?

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Define Writable data types in MapReduce?

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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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Difference between mapreduce and spark

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What are the primary phases of a Reducer?

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How data is spilt in Hadoop?

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What is SequenceFileInputFormat?

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How do reducers communicate with each other?

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What are the advantages of using mapreduce with hadoop?

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