what does the conf.setMapper Class do ?


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More MapReduce Interview Questions

Describe what happens to a mapreduce job from submission to output?

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Is there any point of learning mapreduce, then?

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What is the utility of using Writable Comparable Custom Class in Map Reduce code?

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What is a RecordReader in Hadoop 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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What is difference between a MapReduce InputSplit and HDFS block

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Define Writable data types in MapReduce?

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Which Sorting algorithm is used in Hadoop MapReduce?

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What is the default value of map and reduce max attempts?

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Why comparison of types is important for MapReduce?

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Illustrate a simple example of the working of MapReduce.

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What is heartbeat in hdfs? Explain.

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