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  1. Categories >> Software >> Big Data >> Hadoop >> Apache Hadoop
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What is Derby database?

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More Apache Hadoop Interview Questions

What are the limitations of importing RDBMS tables into Hcatalog directly?

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What are the modules that constitute the Apache Hadoop 2.0 framework?

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Should we use RAID in Hadoop or not?

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What are watches?

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Define a combiner?

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Have you ever used Counters in Hadoop. Give us an example scenario?

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Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?

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what is meaning Replication factor?

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Explain the Job OutputFormat?

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What is version-id mismatch error in hadoop?

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Who is a 'user' in HDFS?

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