What is the jobtracker and what it performs in a hadoop cluster?
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What happens to a namenode, when job tracker is down?
What is oozie in hadoop?
What are the modules that constitute the Apache Hadoop 2.0 framework?
What is Distributed Cache?
What Mapper does?
What is a Combiner?
What is the port number for NameNode
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
How is the distance between two nodes defined in Hadoop?
Explain the use of tasktracker in the hadoop cluster?
Explain the benefits of block transfer?
How do you categorize a big data?
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