What is the difference between namenode and datanode in hadoop?
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According to IBM, what are the three characteristics of Big Data?
When and how to create hadoop archive?
Give me the examples of Columnar database ?
What is distributed copy (distcp)?
Where are hadoop’s configuration files located and list them?
Mention what daemons run on a master node and slave nodes?
What happens if you don?t override the mapper methods and keep them as it is?
Compare Hadoop 2 and Hadoop 3?
What is tasktracker in hadoop?
What is the use of context object?
What does rack awareness algorithm means and why is it utilized as a part of hadoop?
Give me examples of unstructured data?
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