Answer / Arun Dwivedi

"Big Data is typically categorized based on the 3 V's: Volume (the amount of data), Velocity (speed at which data is generated, processed, and analyzed), and Variety (diversity of data types and sources). In Apache Hadoop, big data applications often involve dealing with unstructured or semi-structured data from various sources such as logs, social media feeds, sensors, etc."n

Where do you specify the Mapper Implementation?

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What are the functions of NameNode?

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How to change replication factor of files already stored in HDFS?

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What is Rack awareness?

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If a data Node is full how it's identified?

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What is commodity hardware?

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What is a task instance in hadoop? Where does it run?

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What is a heartbeat in HDFS?

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What is the port number for NameNode

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How can we check whether namenode is working or not?

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Explain the shuffle?

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What is the best hardware configuration to run Hadoop?

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