Answer / Sandeep Kumar Bharti

reduceByKey() is a transformational operation in Apache Spark used for aggregating values associated with the same key across different RDD partitions.

What is action, how it process data in apache spark

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Can you explain apache spark?

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How are sparks created?

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Explain about the common workflow of a Spark program?

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What does reduce action do?

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What are the common faults of the developer while using Apache Spark?

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Which file systems does Spark support?

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What are the ways in which Apache Spark handles accumulated Metadata?

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How is fault tolerance achieved in Apache Spark?

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How many ways can you create rdd in spark?

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explain the use of blinkdb?

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Describe Spark SQL?

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