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What is heartbeat in hdfs? Explain.


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More MapReduce Interview Questions

List out Hadoop's three configuration files?

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

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

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What is Distributed Cache in the MapReduce Framework?

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What is the purpose of textinputformat?

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Explain how do ‘map’ and ‘reduce’ work?

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What does a split do?

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Explain slot in Hadoop Map-Reduce v1?

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Explain about the partitioning, shuffle and sort phase

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Can there be no Reducer?

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When should you use a reducer?

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Explain what is distributed cache in mapreduce framework?

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