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How will you write a custom partitioner for a Hadoop job?


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More Hadoop General Interview Questions

What does the high availability of a name-node means? How is it accomplished?

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

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What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

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What is the default replication factor in Hadoop and how will you change it?

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What is Balancer in Hadoop?

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After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

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Can you define a checkpoint?

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What is the relationship between Jobs and Tasks in Hadoop?

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What are the different modes in which we can configure/install Hadoop?

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What is the difference between namenode and datanode in hadoop?

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Can you explain edge nodes in hadoop?

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What is Mapper in Hadoop?

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