Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
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what happens when namenode goes down during file read operation in hadoop?
We have already sql then why nosql?
When should be hadoop archive create?
Why do we need Hadoop Archives? How is it created?
What jobtracker is in hadoop? What are the activities followed by hadoop?
What are the core methods of a Reducer?
How NameNode tackle Datanode failures in Hadoop?
Name the most common Input Formats defined in Hadoop? Which one is default?
Comparison between Secondary NameNode and Checkpoint Node in Hadoop?
What is streaming in Hadoop?
What is pseudo-distributed mode?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
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