Answer / Shashi Kant Mishra

A RecordReader in Hadoop is an abstraction for reading data from various input sources (e.g., text files, databases). It provides the MapReduce framework with key-value pairs, where the key is usually the offset within the file and the value is the actual data.

What is pseudo-distributed mode?

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What are the most common OutputFormat in Hadoop?

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Compare Apache Hadoop and Apache Spark?

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Why slaves limited to 4000 in hadoop version 1?

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