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What is the key difference between NameNode and DataNode in Hadoop?
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Can hadoop replace relational database?
How can you set an arbitrary number of Reducers to be created for a job in Hadoop?
What happen on the namenode when a client tries to read a data file?
Which are the three modes in which hadoop can be run?
What is the most widely recognized info formats characterized in hadoop?
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Can we deploy job tracker other than name node?
What did mean by data-node?
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