What is Mapper in Hadoop?
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What happens if you don?t override the mapper methods and keep them as it is?
Ideally what should be the block size in hadoop?
List of the some best tools that can be useful for data-analysis?
What jobtracker is in hadoop? What are the activities followed by hadoop?
What do you know about yarn?
What are the main components in Hadoop Eco-System and what are their functions ?
In which directory hadoop is installed?
what is next step after mapper or maptask?
Comparison between Secondary NameNode and Checkpoint Node in Hadoop?
What type of data hadoop can handle ?
Define a udf?
If DataNode increases, then do we need to upgrade NameNode in Hadoop?
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