On what basis data will be stored on a rack?
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What are the most commonly defined input formats in Hadoop?
What stored in HDFS?
shouldn't DFS be able to handle large volumes of data already?
Where is the Mapper Output intermediate kay-value data stored ?
Which files are used by the startup and shutdown commands?
what is the default replication factor in HDFS?
What do you know about nlineoutputformat?
How did you debug your Hadoop code ?
Explain a simple Map/Reduce problem.
In which location Name Node stores its Metadata and why?
Is it necessary to write jobs for hadoop in the java language?
Explain the difference between NameNode