What is the basic difference between traditional RDBMS and Hadoop?
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What are the configuration files in Hadoop?
Why do we need Hadoop?
What did mean by data-node?
What is TaskTracker?
What is the most widely recognized info formats characterized in hadoop?
Give me the examples of Columnar database ?
How can you set an arbitrary number of mappers to be created for a job in Hadoop?
Can we create a hadoop cluster from scratch?
Explain Hadoop streaming?
Doesn’t google have its very own version of dfs?
What happen on the namenode when a client tries to read a data file?
Clarify what is sequence file input format?
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