Mention what is rack awareness?

381

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Mention what is the difference between an rdbms and hadoop?

420

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

419

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

614

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Explain what is storage and compute nodes?

510

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Explain how jobtracker schedules a task?

465

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

433

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What happens in text format?

434

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

443

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Explain what is a task tracker in hadoop?

433

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Explain what is speculative execution?

423

---

Explain what happens in text format?

571

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Mention what is distributed cache in hadoop?

438

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Explain how can you debug hadoop code?

462

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

428

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