How to come out of the insert mode?
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What is a namenode? How many instances of namenode run on a hadoop cluster?
What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
What is Schema on Read and Schema on Write?
What will you do when NameNode is down?
How to change replication factor of files already stored in HDFS?
What is rack-aware replica placement policy?
Explain the Job OutputFormat?
What is Distributed Cache?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
What problems have you faced when you are working on Hadoop code?
what is a datanode?
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