What jobtracker is in hadoop? What are the activities followed by hadoop?
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What is data cleansing?
What are input format, input split & record reader and what they do?
What is streaming in Hadoop?
Can hadoop handle streaming data?
Give me examples of unstructured data?
Can you explain record reader?
Explain Data Locality in Hadoop?
What are the hadoop configuration files at present?
Is Namenode machine same as DataNode machine as in terms of hardware?
How NameNode tackle Datanode failures in Hadoop?
What is rack awareness in hadoop?
Define a sequence file in hadoop?
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