What is the purpose of RecordReader in hadoop?
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Can you explain rack awareness?
What does jps command do in Hadoop?
How to add/delete a Node to the existing cluster?
What are the port numbers of job tracker?
Which port does SSH work on?
What do you understand by a closure in scala?
Explain how can you debug hadoop code?
How often DataNode send heartbeat to NameNode in Hadoop?
What is active and passive NameNode in Hadoop?
What kind of hardware is best for hadoop?
What is a Heartbeat in Hadoop?
If no custom partitioner is defined in Hadoop then how is data partitioned before it is sent to the reducer?
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