If there is certain data that we want to use again and again in different transformations, what should improve the performance?

322

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Explain partitions?

296

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Explain api create or replace tempview()?

351

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Define parquet file format? How to convert data to parquet format?

343

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Explain mappartitions() and mappartitionswithindex()?

440

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Explain pipe() operation. How it writes the result to the standard output?

304

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Explain transformation in rdd. How is lazy evaluation helpful in reducing the complexity of the system?

360

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How to identify that given operation is transformation/action in your program?

303

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explain the use of blinkdb?

317

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

357

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Explain parquet file?

307

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What is lazy evaluation and how is it useful?

316

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How is transformation on rdd different from action?

358

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What is a dataset? What are its advantages over dataframe and rdd?

313

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What is pagerank?

302

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