What is high availability in hadoop?
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Is secondary namenode a substitute to the namenode?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
How to come out of the insert mode?
What are the different methods to run Spark over Apache Hadoop?
What hadoop does in safe mode?
what should be the ideal replication factor in hadoop?
What do you understand from Node redundancy and is it exist in hadoop cluster?
What problems have you faced when you are working on Hadoop code?
Why are the number of splits equal to the number of maps?
What is the port number for NameNode
What if rack 2 and datanode fails?
Which one is default InputFormat in Hadoop ?
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