Latest Hadoop HDFS Interview Questions and answers

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Latest Hadoop HDFS Interview Questions and answers which can be asked in any interview.
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Answer to the question at 3:00 min is wrong. One should run the re-balance process in the NN, which will transfer some data from its existing DN to the newly installed DN to balance the load.  

mohiuddinopu
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At 1:48 definition of datanode is wrong..

anuragpandey