What is high availability in hadoop?
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What are the additional benefits YARN brings in to Hadoop?
How many maximum jvm can run on a slave node?
What happens to a NameNode that has no data?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
In which location Name Node stores its Metadata and why?
What is the communication channel between client and namenode/datanode?
What is Apache Hadoop YARN?
Give the use of the bootstrap panel.
What is oozie in hadoop?
Input Split & Record Reader and what they do?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
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