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What is lazy evaluation and how is it useful?

Answer Posted / Ajay Kant Singh

"Lazy Evaluation" in Apache Spark refers to a process where the computation of an action or transformation is not performed immediately but only when the result is required. This strategy helps in improving the efficiency of the system as it reduces memory consumption and allows for better resource utilization. Lazy evaluation also enables pipeline parallelism, allowing multiple operations to be scheduled on available resources and executed concurrently.n

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