Explain how is hadoop different from other data processing tools?
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How do you define "block" in HDFS?
How many Daemon processes run on a Hadoop system?
How is the distance between two nodes defined in Hadoop?
How you can contact your client everyday ?
Explain why the name ‘hadoop’?
Can we do online transactions(oltp) using hadoop?
What is a namenode? How many instances of namenode run on a hadoop cluster?
What problems can be addressed by using Zookeeper?
Should we use RAID in Hadoop or not?
What is version-id mismatch error in hadoop?
Explain InputFormat?
Explain a simple Map/Reduce problem.
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