Answer / Dharmesh Kumar

In Spark, Actions are high-level operations that trigger the execution of all pending tasks for a dataset and return a value. Examples include count(), collect(), saveAsTextFile(), and foreach().

Is spark a special attack?

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What happens to rdd when one of the nodes on which it is distributed goes down?

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What is flatmap?

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Explain the Parquet File format in Apache Spark. When is it the best to choose this?

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Does spark store data?

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What is sc parallelize?

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How do I get better performance with spark?

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Name a few commonly used spark ecosystems?

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What is the difference between map and flatmap?

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Why spark is faster than hadoop?

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Can you define rdd?

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