What problems have you faced when you are working on Hadoop code?
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What are the limitations of importing RDBMS tables into Hcatalog directly?
Explain the core components of hadoop?
How did you debug your Hadoop code ?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
What is the difference between Apache Hadoop and RDBMS?
What are active and passive "NameNodes"?
How to enable/configure the compression of map output data in hadoop?
On what basis name node distribute blocks across the data nodes?
How many JVMs run on a slave node?
How many Daemon processes run on a Hadoop system?
What are the problems with Hadoop 1.0?
shouldn't DFS be able to handle large volumes of data already?
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