Mention what is rack awareness?

359

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Mention what is the difference between an rdbms and hadoop?

389

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Mention what are the three modes in which hadoop can be run?

390

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Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

577

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Explain what is storage and compute nodes?

479

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Explain how jobtracker schedules a task?

434

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Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

399

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What happens in text format?

416

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Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

404

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Explain what is a task tracker in hadoop?

394

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Explain what is speculative execution?

391

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Explain what happens in text format?

530

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Mention what is distributed cache in hadoop?

404

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Explain how can you debug hadoop code?

437

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Explain how can you check whether namenode is working beside using the jps command?

398

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