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What is Combiner in MapReduce?


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More MapReduce Interview Questions

What is heartbeat in hdfs? Explain.

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How do ‘map’ and ‘reduce’ work?

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Explain the Reducer's Sort phase?

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What is streaming?

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How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?

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What is a "map" in Hadoop?

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Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

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what are the main configuration parameters that user need to specify to run Mapreduce Job ?

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What MapReduce framework consists of?

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Is there any point of learning mapreduce, then?

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What is the difference between HDFS block and input split?

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Explain about the partitioning, shuffle and sort phase in MapReduce?

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