On which port does ssh work?
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Explain how input and output data format of the hadoop framework?
What is a Secondary Namenode? Is it a substitute to the Namenode?
How do you define "block" in HDFS?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
How we can change Replication factor when Data is on the fly?
How to exit the vi editor?
Mention what are the data components used by Hadoop?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What happens to a namenode, when job tracker is down?
What is DistributedCache and its purpose?
Name the various types of lists supported by bootstrap.
Explain the use of tasktracker in the hadoop cluster?
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