What are active and passive "NameNodes"?


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More Apache Hadoop Interview Questions

what is the default replication factor in HDFS?

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Explain a simple Map/Reduce problem.

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Is secondary namenode a substitute to the namenode?

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What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?

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What happens to a NameNode that has no data?

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What are the modes in which Apache Hadoop run?

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what is meaning Replication factor?

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What is the problem with small files in Apache Hadoop?

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Where is the Mapper Output intermediate kay-value data stored ?

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How we can change Replication factor when Data is on the fly?

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Can Hadoop be compared to NOSQL database like Cassandra?

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How to keep HDFS cluster balanced?

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