Answer / Gaurav Kumar Saxena

HDFS does not support traditional database-style indexing. Instead, it relies on the hierarchical file structure and NameNode for efficient data retrieval. The NameNode maintains a directory of all files in the HDFS cluster and their locations on DataNodes.

How to access HDFS?

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Can you define a block and block scanner in hdfs?

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What are tools available to send the streaming data to hdfs?

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What is the difference betwaeen mapreduce engine and hdfs cluster?

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What is Block in HDFS?

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List the files associated with metadata in hdfs?

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What do you mean by meta data in hdfs? List the files associated with metadata.

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Explain how indexing is done in hdfs?

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If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

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What is the difference between an input split and hdfs block?

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What is the difference between MapReduce engine and HDFS cluster?

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While processing data from hdfs, does it execute code near data?

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