What is a rack?
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Explain map-only job?
What is the difference between TextInputFormat and KeyValueInputFormat class?
In which location name node sores its metadata and why?
Compare Hadoop 2 and Hadoop 3?
Clarify what is sequence file input format?
What is difference between reducer and combiner?
List out some common problems faced by data analyst?
Mention what is distributed cache in hadoop?
What are the port numbers of job tracker?
What is Small File Problem in Hadoop? How can it be resolved?
How NameNode tackle Datanode failures in Hadoop?
How jobtracker assign tasks to the tasktracker?
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