How to use Apache Zookeeper command line interface?
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On what basis Namenode will decide which datanode to write on?
Define a namenode?
what are Task Tracker and Job Tracker?
What is a task instance in hadoop? Where does it run?
Why the name ‘hadoop’?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
What is commodity hardware?
What is difference between split and block in hadoop?
What is rack-aware replica placement policy?
How will you make changes to the default configuration files?
What are sink processors?
What are the limitations of importing RDBMS tables into Hcatalog directly?
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