What are the Basics of Hadoop?
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What is nlineoutputformat?
Explain why do we need hadoop?
Do we need to give a password, even if the key is added in ssh?
What do sorting do?
How is HDFS fault tolerant?
Why do we need a password-less ssh in fully distributed environment?
On what basis name node distribute blocks across the data nodes?
What is the purpose of dfsadmin tool?
Should we use RAID in Hadoop or not?
Define streaming?
What is partioner in hadoop? Where does it run,mapper or reducer?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
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