Why is transformation lazy operation in Apache Spark RDD? How is it useful?

271

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Explain fullOuterJoin() operation in Apache Spark?

395

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How many partitions are created by default in Apache Spark RDD?

281

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Explain coalesce operation in Apache Spark?

307

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Explain the level of parallelism in spark streaming?

278

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Explain join() operation in Apache Spark?

337

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How to process data using Transformation operation in Spark?

283

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What is Resilient Distributed Dataset (RDD) in Apache Spark? How does it make spark operator rich?

254

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What are the differences between Caching and Persistence method in Apache Spark?

297

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Explain the operation reduce() in Spark?

267

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Explain the lookup() operation in Spark?

215

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Explain the processing speed difference between Hadoop and Apache Spark?

261

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Explain the operation transformation and action in Apache Spark RDD?

308

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Explain Spark join() operation?

262

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How is RDD in Apache Spark different from Distributed Storage Management?

328

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