Differentiate Reducer and Combiner in Hadoop MapReduce?


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More MapReduce Interview Questions

What is Text Input Format?

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when do reducers play their role in a mapreduce task?

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Where is Mapper output stored?

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What does a 'MapReduce Partitioner' do?

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How to write a custom partitioner for a Hadoop MapReduce job?

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What are advantages of Spark over MapReduce?

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what does the conf.setMapper Class do ?

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What is identity mapper and reducer? In which cases can we use them?

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Why is Apache Spark faster than Hadoop MapReduce?

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Define the purpose of the partition function in mapreduce framework

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What do sorting and shuffling do?

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What is a Speculative Execution in Hadoop MapReduce?

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