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What is a combiner in hadoop?


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More Hadoop General Interview Questions

Can you define a checkpoint?

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Explain the core methods of the reducer?

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What do you know about the speculative execution?

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What is the use of recordreader in hadoop?

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How is security achieved in Hadoop?

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What are the four modules that make up the Apache Hadoop framework?

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Whats the default port that jobtrackers listens ?

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Why slaves limited to 4000 in hadoop version 1?

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How many datanodes can run on a single Hadoop cluster?

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What is the difference between a hadoop database and relational database?

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What are the port numbers of job tracker?

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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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