Explain the Job OutputFormat?
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What do the master class and the output class do?
On which port does ssh work?
Have you ever used Counters in Hadoop. Give us an example scenario?
Command to format the NameNode?
how can we change Replication Factor?
What are the basic available commands in Hadoop sqoop ?
What is the sequencefileinputformat in hadoop?
What are sink processors?
What is the difference between rdbms and hadoop?
What is difference between regular file system and HDFS?
What will you do when NameNode is down?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
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