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How to use combiner in hadoop ?


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More Hadoop General Interview Questions

What is the problem with small files in Hadoop?

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Can you define a checkpoint?

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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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Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

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What is the difference between TextinputFormat and KeyValueTextInputFormat class?

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Explain how can we check whether namenode is working or not?

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What is the command to change the replication factor ?

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What sorts of actions does the job tracker process perform?

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What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

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Explain Erasure Coding in Hadoop?

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Why would nosql be better than using a sql database? And how much better is it?

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Why slaves limited to 4000 in hadoop version 1?

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