What hadoop does in safe mode?


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More Apache Hadoop Interview Questions

What is the difference between SQL and NoSQL?

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how is a file of the size 1 GB uncompressed

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On what basis name node distribute blocks across the data nodes?

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Define a commodity hardware? Does commodity hardware include ram?

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How can we check whether namenode is working or not?

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What Mapper does?

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What is Distributed Cache?

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What is the default replication factor?

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Define fault tolerance?

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What is the sequencefileinputformat in hadoop?

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What is difference between split and block in hadoop?

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Explain a simple Map/Reduce problem.

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