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


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More Hadoop General Interview Questions

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

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What is a commodity hardware? Does commodity hardware include RAM?

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What is difference between secondary namenode, checkpoint namenode & backupnode?

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What is the hadoop-core configuration?

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What are the important features of hadoop?

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Explain the core methods of the reducer?

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Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

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Ideally what should be the replication factor in hadoop?

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What do you know about the speculative execution?

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Name the most common Input Formats defined in Hadoop? Which one is default?

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Define data cleansing?

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Do we require two servers for the namenode and the datanodes?

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