Explain a simple Map/Reduce problem.
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What is nlineoutputformat?
What is a heartbeat in HDFS?
What happens in a textinputformat?
What is InputSplit and RecordReader?
Explain the benefits of block transfer?
Is hadoop a database?
Who invented hadoop?
What is a task instance in hadoop? Where does it run?
What are the modes in which Apache Hadoop run?
What is HDFS Federation?
Can we call vms as pseudos?
How we can take Hadoop out of Safe Mode?
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