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Could someone tell me what is Lazy Evaluation in Spark?

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Lazy Evaluation is an evaluation strategy, in Spark, by which Spark does not evaluate or delay the evaluation of every transformation until it’s needed or called upon, or demanded. This is built into Spark, to render efficiency and performance. If you are interested in learning Spark, check out the Spark certification course, from Intellipaat. And if you want to get your fundamentals right in Spark, watch the following video on Spark Tutorial to get started. 

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