Answer / Vaishali Vashisth

To add a node to an existing Hadoop cluster, follow these steps: 1. Install and configure Hadoop on the new node. 2. Update the slave file on all nodes with the IP address of the new node. 3. Add the new node to the HDFS configuration file on the Namenode. To delete a node, you can remove its IP address from the appropriate files.

While starting hadoop services, datanode service is not running?

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What are the benefits yarn brings in to hadoop?

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How can one check whether NameNode is working or not?

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Mention what job does the conf class do?

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What is the use of recordreader in hadoop?

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

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Can you explain indexing?

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What are the main features and Characteristics of Hadoop which makes it the most popular and powerful Big Data tool?

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Explain the Single point of Failure in Hadoop?

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What is the difference between namenode and datanode in hadoop?

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How is the splitting of file invoked in Hadoop framework?

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Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?

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