Describe coalesce() operation. When can you coalesce to a larger number of partitions? Explain.

348

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When we create an rdd, does it bring the data and load it into the memory?

360

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What does reduce action do?

293

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how can you identify whether a given operation is transformation or action?

283

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Explain the use of broadcast variables

336

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How do you parse data in xml? Which kind of class do you use with java to pass data?

321

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Explain sortbykey() operation?

305

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List various commonly used machine learning algorithm?

394

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What are the ways in which one can know that the given operation is transformation or action?

294

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Describe join() operation. How is outer join supported?

304

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What is the method to create a data frame?

329

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On what all basis can you differentiate rdd, dataframe, and dataset?

327

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How can you manually partition the rdd?

316

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How to create an rdd?

308

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What is an rdd?

324

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