Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?
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What is the difference between namenode and datanode in hadoop?
What is streaming access?
How does hadoop achieve fault tolerance?
What kind of hardware is best for hadoop?
How does job tracker schedule a job for the task tracker?
Does hadoop follows the unix pattern?
Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?
Explain Erasure Coding in Hadoop?
Is it possible to have hadoop job output in multiple directories?
Explain map-only job?
What is the difference between an inputsplit and a block?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
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