What is Disk Balancer in Apache Hadoop?
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Explain the use of .mecia class?
How does a namenode handle the failure of the data nodes?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
Define tasktracker.
What is the problem with small files in Apache Hadoop?
What is the difference between rdbms and hadoop?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
Mention what is the number of default partitioner in Hadoop?
Why is hadoop faster?
What is high availability in hadoop?
Explain a simple Map/Reduce problem.
Is it necessary to write jobs for hadoop in the java language?