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What is difference between reducer and combiner?


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More Hadoop General Interview Questions

Mention what are the most common input formats defined in hadoop?

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What do you understand by unit and ()in scala?

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Which modes can Hadoop be run in? List a few features for each mode?

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What is 'jps'?

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Compare Hadoop 2 and Hadoop 3?

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Why cloudera is used?

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How jobtracker assign tasks to the tasktracker?

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Clarify what is sequence file input format?

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What do you think about the speculative execution?

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When should be hadoop archive create?

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Specify what the information segments utilized by hadoop are?

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How many maps are there in a particular job?

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