Answer / Hemant Kumar Singh

In Hadoop version 1, the limit on the number of slaves (or DataNodes) was set to 4000 due to practical limitations in managing such a large number of nodes. This restriction was primarily imposed by the NameNode's ability to handle and maintain metadata for an extensive number of files and blocks effectively.

Clarify what webdav is in hadoop?

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What happen if one of the datanodes has much slower cpu?

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What is 'jps'?

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Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

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What is Disk Balancer in Hadoop?

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What are the different modes in which we can configure/install Hadoop?

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Mention what is the data storage component used by hadoop?

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What is the default replication factor in Hadoop and how will you change it?

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What is the basic difference between traditional RDBMS and Hadoop?

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Why do we need Hadoop Archives? How is it created?

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Which modes can Hadoop be run in? List a few features for each mode?

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Where are hadoop’s configuration files located and list them?

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