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Hadoop MCQ Quiz (Multiple Choice Questions And Answers)

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16. Reducer is input the grouped output of a

  • Reducer
  • Mapper
  • Writable
  • Readable
View Answer

17. How to adjust the size of a distributed cache

  • local.cache.size.
  • mapred.cache.size.
  • distributedcache.size.
  • hdfs.cache.size.
View Answer

19. Which of the following is the slowest compression technique

  • Gzip
  • Bzip2
  • LZO
  • All of the above
View Answer

20. Which is used to read data from bytes buffers.

  • read()
  • readwrite()
  • write()
  • None of the above
View Answer

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