What are the important features of hadoop?
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What is a Heartbeat in Hadoop?
Which scala library is used for functional programming?
Explain Data Locality in Hadoop?
What happen when namenode enters in safemode in hadoop?
What is the role of the namenode?
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If DataNode increases, then do we need to upgrade NameNode in Hadoop?
What is a single point of failure in Hadoop 1 and how is it resolved in Hadoop 2?
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