In which location Name Node stores its Metadata and why?
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What is the jobtracker?
Where is the Mapper Output stored?
Mention what is the use of Context Object?
How to change from su to cloudera?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
Define a datanode?
What is DistributedCache and its purpose?
What is rack-aware replica placement policy?
Why is hadoop faster?
How many Daemon processes run on a Hadoop system?
Explain why the name ‘hadoop’?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
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