What is safe mode in Hadoop?


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More Apache Hadoop Interview Questions

What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

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What does /var/hadoop/pids do?

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Explain use cases where SequenceFile class can be a good fit?

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What is a “Distributed Cache” in Apache Hadoop?

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What are the four characteristics of Big Data?

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Can we call vms as pseudos?

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What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

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Can the balancer be run while Hadoop is in use?

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What is a Task instance in Hadoop? Where does it run?1

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Is secondary namenode a substitute to the namenode?

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What are the functions of NameNode?

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Is hadoop open source?

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