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Which of the following format is more compression-aggressive?(a) Partition Compressed(b) Record Compressed(c) Block-Compressed(d) UncompressedI got this question in exam.I'd like to ask this question from Hadoop I/O topic in section Hadoop I/O of Hadoop

Answer»

The correct ANSWER is (c) Block-Compressed

Explanation: SEQUENCEFILE key-value LIST can be just a Text/Text pair, and is written to the file during the INITIALIZATION that happens in the SequenceFile.



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