What is Schema on Read and Schema on Write?
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What do slaves consist of?
Define a datanode?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
What is MapFile?
How to write a Custom Key Class?
What happens in a textinputformat?
what are the steps involved in decommissioning removing
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is hbase in hadoop?
What is hadoop framework?
What if a namenode has no data?
What is the function of ApplicationMaster?
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