A

Admin • 832.27K Points
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Q. What is a heartbeat in Hadoop?

  • (A) Signal sent from NameNode to DataNode
  • (B) Health check signal sent from DataNode to NameNode
  • (C) Data packet from reducer
  • (D) Job status update
  • Correct Answer - Option(B)
  • Views: 11
  • Filed under category Hadoop
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Explanation by: Admin

DataNodes send heartbeats to NameNode regularly to confirm they are alive.

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