How to use combiner in hadoop ?
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What mode(s) can hadoop code be run in?
How many datanodes can run on a single Hadoop cluster?
Are there any special requirements for namenode?
What is TaskTracker?
Mention what is distributed cache in hadoop?
Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
Is there another way to check whether Namenode is working?
What is KeyValueTextInputFormat in Hadoop?
Why we use intwritable instead of int? Why we use longwritable instead of long?
What is a record reader?
What is fsck?
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