A

Admin • 833.24K Points
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Q. What is speculative execution in MapReduce?

  • (A) Running a task on the fastest node
  • (B) Running a duplicate task to finish early
  • (C) Retrying failed tasks automatically
  • (D) Compressing job output
  • Correct Answer - Option(B)
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  • Filed under category Hadoop
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Explanation by: Admin

Speculative execution runs a backup of slow tasks on another node to speed up job completion.

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