Define a metadata?
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How many instances of a jobtracker run on hadoop cluster?
How to configure hadoop to reuse JVM for mappers?
What is the use of combiners in the hadoop framework?
What are the limitations of importing RDBMS tables into Hcatalog directly?
Explain the overview of hadoop history breifly?
What is inputformat in hadoop?
Define a metadata?
What do slaves consist of?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is Partioner in hadoop? Where does it run
What is output format in hadoop?
How do you define "block" in HDFS?
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