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Explain what is speculative execution?


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More Hadoop General Interview Questions

What is the difference between TextInputFormat and KeyValueInputFormat class?

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Can you define udf?

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Is there another way to check whether Namenode is working?

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How often do you need to reformat the namenode?

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What is High Availability feature in Hadoop2?

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

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Why do we need hadoop for big data analytics?

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Can you explain sequence file in hadoop?

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

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

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What are the core components of Hadoop?

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