What are combiners and its purpose?


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More Apache Hadoop Interview Questions

Is it necessary to know java to learn hadoop?

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What does the command mapred.job.tracker do?

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How is security achieved in Apache Hadoop?

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How can you overwrite the replication factors in HDFS?

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What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?

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What is the difference between hadoop and other data processing tools?

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What is small file problem in hadoop?

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shouldn't DFS be able to handle large volumes of data already?

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What is yarn in hadoop?

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What is NoSQL?

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How to enable recycle bin in hadoop?

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Where is the Mapper Output intermediate kay-value data stored ?

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