Mention what is rack awareness?

424

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Mention what is the difference between an rdbms and hadoop?

469

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

461

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

654

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Explain what is storage and compute nodes?

546

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Explain how jobtracker schedules a task?

512

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

477

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What happens in text format?

487

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

478

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Explain what is a task tracker in hadoop?

503

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Explain what is speculative execution?

461

---

Explain what happens in text format?

613

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Mention what is distributed cache in hadoop?

473

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Explain how can you debug hadoop code?

503

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

479

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