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What is data cleansing?


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More Hadoop General Interview Questions

What are the restriction to the key and value class ?

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What is NameNode? How NameNode tackle Datanode failures in Hadoop?

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According to IBM, what are the three characteristics of Big Data?

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How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

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When we send a data to a node, do we allow settling in time, before sending another data to that node?

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What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

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How to do ‘map’ and ‘reduce’ works?

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What is the job tracker role in hadoop?

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What happen when namenode enters in safemode in hadoop?

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Is hadoop still in demand?

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How often DataNode send heartbeat to NameNode in Hadoop?

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Why aggregation cannot be done in Mapper?

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