What is a secondary namenode?


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More Apache Hadoop Interview Questions

What does ‘jps’ command do?

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What are the stable versions of Hadoop?

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Is secondary namenode a substitute to the namenode?

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What hadoop does in safe mode?

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What is a namenode? How many instances of namenode run on a hadoop cluster?

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What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

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Which files are used by the startup and shutdown commands?

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What is Derby database?

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How to Administering Hadoop?

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Which are the two types of 'writes' in HDFS?

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Is map like a pointer?

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Explain how do ‘map’ and ‘reduce’ works?

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