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How to do ‘map’ and ‘reduce’ works?


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More Hadoop General Interview Questions

How ordering in hdfs is finished?

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Can we deploy job tracker other than name node?

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Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

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What happen if a datanode loses network connection for a few minutes?

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What the information segments utilized by hadoop are?

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Can you explain textinformat?

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What are the primary phases of the reducer?

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Compare Hadoop and RDBMS?

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What are the side data distribution techniques?

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Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

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List out some common problems faced by data analyst?

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What are the port numbers of task tracker?

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