What is data cleansing?
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What is job tracker in Hadoop?
Which database is used in hadoop?
What is the difference between namenode and datanode in hadoop?
What is the difference between an inputsplit and a block?
Is hadoop still in demand?
What is CAP Theorem? What aspects does Hadoop support from this theorem?
What is the job tracker role in hadoop?
what if job tracker machine is down?
What happen if a datanode loses network connection for a few minutes?
Mention what is rack awareness?
What is the purpose of context object?
Why does one remove or add nodes in a Hadoop cluster frequently?
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