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Explain what is the purpose of RecordReader in Hadoop?


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More Apache Hadoop Interview Questions

Explain what is sqoop in Hadoop ?

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What is difference between regular file system and HDFS?

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What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?

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Explain how input and output data format of the hadoop framework?

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How is hadoop different from other data processing tools?

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What is high availability in hadoop?

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Explain how can we change the split size if our commodity hardware has less storage space?

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What is inputsplit in hadoop? Explain.

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

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Is hadoop a database?

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Where is the Mapper Output stored?

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Should we use RAID in Hadoop or not?

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