Why we use intwritable instead of int? Why we use longwritable instead of long?

482

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What happens if you don?t override the mapper methods and keep them as it is?

461

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What are the side data distribution techniques?

472

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Can we deploy job tracker other than name node?

677

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Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

440

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How many maps are there in a particular job?

457

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Can I set the number of reducers to zero?

397

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Doesn’t google have its very own version of dfs?

477

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What are the restriction to the key and value class ?

431

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If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?

659

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If datanodes increase, then do we need to upgrade namenode?

459

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Which object can be used to get the progress of a particular job

469

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Give me examples of unstructured data?

475

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Explain the core methods of the reducer?

507

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How to handle bad records during parsing?

451

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