What is the difference between namenode and datanode in hadoop?
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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?
What happens in text format?
What is namenode?
What is High Availability feature in Hadoop2?
Define a udf?
What happen when namenode enters in safemode in hadoop?
Name the most common Input Formats defined in Hadoop? Which one is default?
How many InputSplits will be made by hadoop framework?
What is check pointing in hadoop?
What is Rack Awareness? What is its need in Hadoop?
What is the procedure for namenode recovery?
How many job tracker processes can run on a single Hadoop cluster?
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