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What happen on the namenode when a client tries to read a data file?


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More Hadoop General Interview Questions

What is the difference between an inputsplit and a block?

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What are the main components of hadoop?

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What are the modes in which Hadoop run?

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What is the use of recordreader in hadoop?

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How to handle bad records during parsing?

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How many maps are there in a particular job?

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Is it possible to provide multiple input to Hadoop? If yes then how?

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What are the side effects of not running a secondary name node?

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What are the Hadoop features extended to its eco-system components ?

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

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Do we need to place 2nd and 3rd data in rack 2 only?

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Explain Erasure Coding in Hadoop?

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