How namenode handles data node failures?
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Can hadoop handle streaming data?
Explain what happens in text format?
How to handle bad records during parsing?
Explain Hadoop streaming?
What is Erasure Coding in Hadoop?
Why we use intwritable instead of int? Why we use longwritable instead of long?
Can you explain record reader?
What are input format, input split & record reader and what they do?
What is CAP Theorem? What aspects does Hadoop support from this theorem?
Give me the examples of Columnar database ?
Which directory does hadoop install to?
How would you restart NameNode?
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