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Mention what is the hadoop mapreduce apis contract for a key and value class?


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More MapReduce Interview Questions

What are the primary phases of a Reducer?

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Explain what you understand by speculative execution

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What is the best way to copy files between HDFS clusters?

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Is it possible to split 100 lines of input as a single split in MapReduce?

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How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

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What do you know about nlineinputformat?

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Why do we need MapReduce during Pig programming?

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What is a RecordReader in Hadoop MapReduce?

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How can you add the arbitrary key-value pairs in your mapper?

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Why Mapper runs in heavy weight process and not in a thread in MapReduce?

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What are the advantages of using mapreduce with hadoop?

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How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

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