How Mapper is instantiated in a running job?


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More Apache Hadoop Interview Questions

In which location Name Node stores its Metadata and why?

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What are the most commonly defined input formats in Hadoop?

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What other technologies have you used in hadoop sta ck?

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Whats is distributed cache in hadoop?

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How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

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did you maintain the hadoop cluster in-house or used hadoop in the cloud?

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Explain the wordcount implementation via hadoop framework ?

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What is NoSQL?

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What do the master class and the output class do?

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What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

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What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?

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Define a commodity hardware? Does commodity hardware include ram?

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