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what is JobTracker in Hadoop? What are the actions followed by Hadoop?


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More MapReduce Interview Questions

What are ‘maps’ and ‘reduces’?

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

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When Namenode is down what happens to job tracker?

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Explain what is shuffling in mapreduce?

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What is Data Locality in Hadoop?

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how Hadoop is different from other data processing tools?

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How to overwrite an existing output file during execution of mapreduce jobs?

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What is the need of MapReduce?

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What is identity mapper and identity reducer?

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What is Text Input Format?

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What is the difference between HDFS block and input split?

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What can be optimum value for Reducer?

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