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What is Safemode in Apache Hadoop?


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More Apache Hadoop Interview Questions

What is difference between split and block in hadoop?

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What is the purpose of dfsadmin tool?

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How many JVMs run on a slave node?

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

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How blocks are distributed among all data nodes for a particular chunk of data?

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Define a job tracker?

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Explain the shuffle?

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How can I install Cloudera VM in my system?

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What does job conf class do?

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Mention what is the number of default partitioner in Hadoop?

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What happens to job tracker when namenode is down?

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What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

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