Explain why do we need hadoop?
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How to enable trash/recycle bin in hadoop?
Who invented hadoop?
What is the difference between a Hadoop and Relational Database and Nosql?
How to Administering Hadoop?
Why do we use Hadoop?
On what basis name node distribute blocks across the data nodes?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
Have you ever used Counters in Hadoop. Give us an example scenario?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
what is a datanode?
What is the full form of fsck?
Explain how is hadoop different from other data processing tools?
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