Explain in which directory hadoop is installed?
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If DataNode increases, then do we need to upgrade NameNode?
How ordering in hdfs is finished?
Why do we need Hadoop?
What is the logistic regression?
Define a sequence file in hadoop?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
Which one is default?
Explain what is namenode in hadoop?
What do you understand by a closure in scala?
If the hadoop administrator needs to make a change, which configuration file does he need to change?
Explain the core methods of the reducer?
Explain small file problem in hadoop
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