Write the command to start and stop the spark in an interactive shell?

270

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Define various running modes of apache spark?

278

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What are the ways to run spark over hadoop?

308

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What is catalyst query optimizer in apache spark?

287

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What are the various types of shared variable in apache spark?

291

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Define the common faults of the developer while using apache spark?

287

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What is the use of spark driver, where it gets executed on the cluster?

359

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What is speculative execution in spark?

315

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Explain write ahead log(journaling) in spark?

264

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Explain values() operation in apache spark?

493

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Define the level of parallelism and its need in spark streaming?

391

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Define sparksession in apache spark? Why is it needed?

275

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Describe different transformations in dstream in apache spark streaming?

301

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In hadoop_pid_dir, what does pid stands for?

520

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What are the network requirements for hadoop?

474

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