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How would you check whether your NameNode is working or not?


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More Hadoop General Interview Questions

What is JPS? Why is it used in Hadoop?

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What are the common types of NOSQL data bases ?

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What does the mapred.job.tracker command do?

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How to use combiner in hadoop ?

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Why is Data Block size set to 128 MB in Hadoop?

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What is the command to change the replication factor ?

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Can you give a detailed overview about the Big Data being generated by Facebook?

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What is rack awareness in hadoop?

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Does hadoop follows the unix pattern?

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Clarify how ordering in hdfs is finished?

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If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?

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

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