What do the master class and the output class do?


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More Apache Hadoop Interview Questions

Is hadoop a database?

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What is Writable & WritableComparable interface?

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What are the port numbers of namenode, job tracker and task tracker?

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Explain the features of stand alone (local) mode?

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Why do we use HDFS for applications having large data sets and not when there are lot of small files?

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Can NameNode and DataNode be a commodity hardware?

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What is the difference between hadoop and other data processing tools?

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What are the functionalities of jobtracker?

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Explain what happens in textinformat ?

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Is fs.mapr.working.dir a single directory?

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Mention what are the data components used by Hadoop?

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What is a checkpoint?

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