How to Administering Hadoop?
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What is Disk Balancer in Apache Hadoop?
What is keyvaluetextinputformat?
How many JVMs run on a slave node?
What is a 'block' in HDFS?
What is Apache Hadoop YARN?
What if a namenode has no data?
What are active and passive "NameNodes"?
What is the difference between Hadoop and Traditional RDBMS?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
What is a heartbeat in HDFS?
What are the different types of Znodes?
How does NameNode tackle DataNode failures?
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