Explain the hadoop-core configuration?
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What is a “Distributed Cache” in Apache Hadoop?
How many instances of JobTracker can run on a Hadoop Cluser?
How many maximum jvm can run on a slave node?
What's the best way to copy files between HDFS clusters?
Explain the shuffle?
What is InputSplit and RecordReader?
Why the name ‘hadoop’?
Explain how is hadoop different from other data processing tools?
What Mapper does?
What hadoop does in safe mode?
Explain the features of fully distributed mode?
How is the distance between two nodes defined in Hadoop?
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