Define a commodity hardware? Does commodity hardware include ram?
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What is the difference between Hadoop and Traditional RDBMS?
How blocks are distributed among all data nodes for a particular chunk of data?
What problems can be addressed by using Zookeeper?
What is a Record Reader in hadoop?
What if a namenode has no data?
Which is the best hadoop certification?
What happens to a NameNode that has no data?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is Input Split in hadoop?
What is Schema on Read and Schema on Write?
How to enable/configure the compression of map output data in hadoop?
Explain the master class and the output class do?
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