What is job tracker role in hadoop?
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Explain how can you debug hadoop code?
Why do we need Hadoop?
Which database is used in hadoop?
How can one check whether NameNode is working or not?
Compare Hadoop 2 and Hadoop 3?
Can you explain the common input formats in hadoop?
What is the NameNode port number?
Mention what are the most common input formats defined in hadoop?
Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
What is the logistic regression?
How does job tracker schedule a job for the task tracker?
What happen if one of the datanodes has much slower cpu?
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