What is Small File Problem in Hadoop? How can it be resolved?
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List Hadoop’s three configuration files?
What is namenode?
What is Rack Awareness? What is its need in Hadoop?
What is the use of recordreader in hadoop?
What happens if you get a ‘connection refused java exception’ when you type hadoop fsck /?
What happens when two clients try to access the same file in the hdfs?
What happen if a datanode loses network connection for a few minutes?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What the information segments utilized by hadoop are?
What is Combiner in Hadoop?
How job tracker schedules an assignment?
Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?
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