Does google use hadoop?
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Explain the difference between NameNode
How many JVMs run on a slave node?
How does master slave architecture in the hadoop?
How is HDFS fault tolerant?
Where is the Mapper Output stored?
What alternate way does HDFS provides to recover data in case a Namenode
What do the master class and the output class do?
What is Input Split in hadoop?
What is the difference between a Hadoop and Relational Database and Nosql?
Why the name ‘hadoop’?
What is a heartbeat 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?
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