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What is a checkpoint?


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More Apache Hadoop Interview Questions

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

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How can I restart namenode?

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Main Components of Hadoop?

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How indexing is done in HDFS?

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what is the default replication factor in HDFS?

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how can we change Replication Factor?

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How does master slave architecture in the hadoop?

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Input Split & Record Reader and what they do?

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What is the difference between hadoop and other data processing tools?

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What is DistributedCache and its purpose?

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What are the stable versions of Hadoop?

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Are Namenode and job tracker on the same host?

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