How do you categorize a big data?
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Who invented hadoop?
What are the modules that constitute the Apache Hadoop 2.0 framework?
What is a 'block' in HDFS?
What are different types of filesystem?
What will you do when NameNode is down?
How does NameNode tackle DataNode failures?
What does /var/hadoop/pids do?
Virtual Box & Ubuntu Installation?
How many instances of JobTracker can run on a Hadoop Cluser?
What is a Task instance in Hadoop? Where does it run?1
What do you understand from Node redundancy and is it exist in hadoop cluster?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
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