What is the use of context object?

505

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What happens if number of reducers are 0?

508

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What are the primary phases of the reducer?

488

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what is next step after mapper or maptask?

458

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What is a rack?

462

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Do we require two servers for the namenode and the datanodes?

556

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We have already sql then why nosql?

471

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What is difference between reducer and combiner?

615

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What do you understand by standalone (or local) mode?

473

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What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

474

---

What is pseudo-distributed mode?

648

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When we send a data to a node, do we allow settling in time, before sending another data to that node?

526

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Can we write map reduce program in other than java programming language. How?

524

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Are job tracker and task trackers present in separate machines?

503

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What is namenode?

518

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